carterJaguar’s post is full of truthful statements. I have decided to step down from both competitive TF2 and moderating this website (hence why I changed my name back to black). I have tried being mentored a handful of times and retained very little from it. I lack the gamesense and general awareness that this game requires to make any kind of reasonable progress as a player, and have decided that I want to spend my time doing different things.
Woahwoahwoah, don't let this incident totally turn you away from TF2 forever assuming you're still passionate about the game. Nobody is a permabad player, don't let yourself think that you as a human being are incapable of improvement. Weather it be TF2 or anything else, improvement comes with consistent effort over a long period of time. I'd be willing to bet that if you really buckled down, watched tons of demos, grinded dm, & talked with better players, your skill level would go up proportionally. If I were you, I'd take a break to let the stress settle and come back to the decision in a clearer head space.