Late to the party but here goes
I was pretty bad at football (soccer) as a kid. I really liked playing it though. My two best friends were playing in a club and I joined it as well, joined their lowest ranked team, rightly so. Bear in mind that there is no lower level than this.
The coach was awful. He yelled at us a lot, absolutely wanted me to play goalkeeper which I hated, but well I was tall so GK it is. After insisting he put me on defense. As said, I was bad, which is why I joined a shit team. The asshole coach contacted my mum to tell her I'm not good enough at football for their shitty ass lowest ranked team. I don't think anything hurt me as much as a kid. Not being allowed to hang out with my friends because I was not good enough for the worst football club out there. Being mocked by the other kids as "the guy who couldn't even play at the worst club around". I was 11 ffs. Why don't you let an 11 years old kid play football? It honestly was a horrible time. I gave up playing football, or any competitive sport, after this for a while, and funnily enough eventually got back to it with a good coach, actually trained and became decent enough to play two leagues higher than the worst one, yay!
Anyway. I ended up being a referee because it pays well for a teenage job. And guess what. I got to referee my old prick of a coach. He didn't recognize me, which was even better. I made sure I'd make this game absolutely horrible for him without jeopardizing the kids playing (it was a 12-13yo team). From stupid things like "You didn't spell your player name correctly on the paper match sheet can you redo it all" (I basically had him rewrite it all twice and do a million roundtrips to the main office before the game), to me going immediately to him if I ever heard him yell anything. I usually don't care much about team coaches as they do yell a lot, but I policed the hell out of this guy and made him shut up more than once, while his players were enjoying seeing him angry over it. I ended up kicking him out of the game with the biggest smirk ever and the kids in his team laughing at him. They still lost 8-0 (yes, even in a team where there is a "selection process"!), but they got to laugh at their coach and I got my mild revenge