If we only play maps where one team has a massive advantage, the score will be obvious right after the map picking stage, allowing us to massively streamline playoffs by not playing the matches at all. None of that "going over the schedule" nonsense. So I think he's onto something.

Thankfully Valve is very upfront about the specs.

So it's not a report. Those are Valve's official specs.
Assuming the APU is limited to exactly that TDP then 2-8 hours is a bit tight, but not completely unrealistic. 5W for the rest of the system (20W for 2 hours) I could buy, 1W (5W for 8 hours) I don't really think is going to happen, though I don't know enough about the display's power consumption to really refute it. I guess it's possible when the APU consumes even less because only one core is barely active and the GPU is deep in power saving mode as well, but that's certainly not happening for AAA games.

EDIT: The Nintendo Switch is getting by with a 16 Wh battery and a chip that officially got a 15W TDP. So remember that all TDPs are lies. If you underclock something hard enough it suddenly becomes really efficient.

It's basically a slightly downclocked Ryzen 3 PRO 4450U/5300U (that's the closest equivalent) with a newer and slightly bigger GPU part (8 CU 1 year old RDNA 2 instead of 5/6 CU 4 year old GCN 5/Vega). It's still a 2 year old Zen 2.
It's sort of a spiritual successor to a bog standard Ryzen 5 3500U. That came out in 2019, with 2 year old Zen 1 4c/8t CPU, 2 year old 8 CU Vega GPU, 15W. So in 2021 you'd get a 2 year old Zen 2 4c/8t CPU, 2 year old 8 CU RDNA GPU. Really the only reason this isn't a list part is that AMD is for some reason still using Vega in their APUs, both for Zen 2 and Zen 3. So Valve needed a semi-custom part to get anything newer than Vega and at that point you might as well get the newest GPU architecture, RDNA 2, not RDNA. They stuck with Zen 2 for some reason though. Probably because it's cheaper.
EDIT: Better comparison: Literally take the Xbox Series S/X or PS5 chip. Cut the CPU in half. Cut the GPU by 2/3 (Series S) to 9/10 (Series X). Cut the bandwidth by 2/3 to 9/10, same as the GPU. There's your Steam Deck chip. Valve literally went to AMD with a console, pointed at it, and said "Give us that, but with a lot less power".

tl;dr
Valve's "innovation" is ordering a very standard semi-custom 15W APU from AMD, that only differs from what you can get in a standard notebook by having a newer GPU part.

The Good:
-It will run literally anything. Anything that runs on a pc should run on this.
-It's a lot more powerful than a Nintendo Switch. 5 times, maybe? That's just a guesstimate. Also more reasonable CPU to GPU ratio. 4 instead of 6 cores + 50% more GPU power seems like a much better deal than the 4500U in the AYA NEO

The Bad:
-It's still a low power mobile APU. While it can run any AAA title it will not run anything recent well. Not even at 1280x800. The GPU is about 1/3 of a 5300(M), literally the lowest-end GPU AMD is still selling. Think RX 550 or GT 1030. The 80$ GPUs from 4 years ago.
-64 GB eMMC is pretty fucking painful, both in terms of size and speed (mostly random access), 130$ for a 256 GB NVMe SSD is bloody robbery, about 3 times what Valve probably pays for it, same thing with 250$ for a 512 GB "high-speed" NVMe SSD

Yes, that should work.
If you want to make extra sure, there's a compatibility list here:
https://www.msi.com/Motherboard/support/MAG-B550-TOMAHAWK#support-mem-21
Compatibility -> Memory By RX-5xxx
You'll need the exact part number.

You'll probably want RAM that isn't an SSD.
The rest seems fine.
850W is more than enough.

No, I don't see how you'd get any substantial difference in TF2 performance. Extra cores wouldn't do anything and you don't want to overclock so it comes down to stock clockrate. Paying 50% more for a 5800X that's 0.1 GHz faster, a bit over 2%, just isn't worth it. I've got no idea how an 11600K(F) compares to a 5600X in TF2 specifically, because it's faster for some things and slower for others. On average it's slightly slower in games, so I wouldn't gamble on that unless someone confirms it's faster or you want to save money (not sure how it'd work out with the mobo, though there's also the 11600) or have another reason.

If he got lost on his own keyboard trying to find the button to change teams, after fumbling and accidentally pressing it while waiting to respawn, then it's really no great loss.
He's clearly not meant for multitasking. With playing the game not distracting him anymore he can now focus on leading the team.

And if he didn't get lost...

RGL about RGL Mods

https://i.imgur.com/X9ocj9n.jpeg

I do have a stake here.
I'm not even playing TF2 anymore, I just come here for the drama, and RGL has been the most consistent source of drama since its inception.

Honestly I just want to know how this mess is supposed to work.
According to the rules

the burden was on Queequey to get the default ringer denied.
So where does the mysterious "mod approval" come into this? Is a mod an admin? How was darty denied without anyone ever seeing the match page? Is there an RGL mod out there you can just DM to deny a default ringer and he'll just go "yeah, sure" without checking anything?
Was darty not properly denied because no admin was contacted (either because it wasn't through official channels or because mods are not admins) yet everyone kept dicking around anyway?

I don't think you are to blame and rescheduling seems sensible but everyone else seems to have not just dropped all the balls, but yeeted them as far away as possible.

The whole line is an insult tbh.

What kind of wishy-washy garbage is that?
Either it's excessive and he as the admin gives the approval to deny the ringer because anything else would be unfair to Queequey's team or it's not excessive, darty is the default ringer and Queequey can go suck it up.
There is no rule that states "default ringers can be denied if they are too skilled but only if there are other ringers available."

So is Fleskore the mysterious "mod approval" or was otherwise involved from the start? Because it sure doesn't sound like it from the screenshots.

And either way it doesn't matter. He's not getting out of that hole.
Here's another quote:
"Ringing a top 3 player regardless of class for a mid IM match is excessive"
He clearly doesn't agree with your interpretation of the rules. Honestly, the rules being up for interpretation by that degree is just asking for inconsistent rulings and people getting screwed over by admins.
https://i.imgur.com/w2gNzlx.jpeg

https://i.imgur.com/w2gNzlx.jpeg

Excuse me?
How was Fleskore led to believe that Darty would be playing scout? Can he not read or does he completely lack short-term memory? He even wrote himself "do you accept darty as a ringer that will only play medic?"

Fleskore knew. He 100% knew. There is no denying that.
https://i.imgur.com/ZuZGdS5.jpeg

https://i.imgur.com/ZuZGdS5.jpeg

https://i.imgur.com/ibSzNR4.jpeg

https://i.imgur.com/ibSzNR4.jpeg

I'm baffled by your inability to read.

I tried putting a hint in my post to keep you from giving wrong advice, be it because you didn't read the question, didn't bother to consider what he'd need, or because wrong advice is oh-so-funny, but apparently it went over your head.

I just find that purposefully giving useless advice is a dick move and not that funny.

Ah yes, just in case he tries to steal his own data from his own storage drive.