idk about it taking 10k hours to master something like tf2 because at a high level most of it is dependent on knowing the player habits of ur team/teams u play against and the only way u rly get that is by playing against them (haha duh xD)
but theres definitely a lot of players who just get straight up stuck/plateau'd because they never discipline themselves and focus on improving whenever they play just because
"idk man my stats look good im definitely not fucking up" (ictus being a prime example of this and corsa too maybe if he doesnt fix it soon)
"it works in open/im"
"it works in mge"
"i only play one class and only know how one class works" (this ones rly sad and will doom u for eternity unless u fight 10000 robots a day or dm until u have banny posture)
"i saw somebody on froyotech do this so instead of trying to understand why they did it im just gonna copy paste the exact same strat and never ever learn how or why its successful"
"we just lose to dumb shit that only works cuz theyre retarded" (that makes u the retard actually)
"we beat them in scrims all the time idk what happens in matches" basing anything concrete off of scrims is retarded
"ugh i just wasnt hitting shots that day/week/whatever/im rusty" learning to tone ur playstyle off of the game ur capable of playing at this exact moment will get u a lot further than pretty much anything i can think of right now, theres no shame in being a tryhard but understand the difference between doing ur best to help ur team win and doing ur best to make urself look good- when u have a hotstreak go fullthrottle but dont think getting one 4k excuses the 6 deaths in a row afterwards
also actually admitting when u fuck up and learning from ur deaths is rly nice dont spend those 8 seconds of deathcam whinging about ur team sarcastically over mumble
if all u do is scrim and prac and ur hella focused and not a mongoloid u can hit invite relatively fast (eSpeCiaLLy if u dont piss off everybody better than u)
as far as people who got good at this game rly fast i think pizza still only has like 1400 hours or some shit and still has insane (easily mid/high invite) dm whenever he plays
hes got like 20k hours of kzmod though so the dudes just a wizard with the mouse