Shpeeismegeorgebaii2) Lose a large majority of players because system isn't good and teams get rolled by experienced teams so they avoid the setup so they can lose less games elsewhere.
Why do most tf2 players hate to lose that much? I loved getting rolled by a prem mix full of people I looked up to in a razer cup and making this horrible video. If razer cups didn't die I'd still be doing my best to make teams and get rolled. I must admit that I kinda forgot about them along with everyone else :/
It's not about losing as much as it is about learning (at least for me)
What's getting rolled by a prem team going to teach a bunch of low open players? Nothing. They don't know what to change about their playstyle. Both their DM and gamesense still wouldn't be good enough to win a round even if they make the right changes. So basically they just have to sit there playing for 30 minutes (or occassionally 15 minutes if the stack decides to not BM them and run permanent offclasses and never push last)
Instead they could play mixes/pugs against other low-mid open players. There teams would be more even and they'd slowly but surely improve because making the right decisions would actually have positive outcomes for them