I might start playing FPS games again. I'm too old to compete with younger people with more time than me.
Excuse when young: No wonder I suck, I'm competing with grownups with better computers than mine.
Excuse when adult: No wonder I suck, I'm competing with youngsters with more free time than me.
I tried some Aim Practice Maps from the workshop. That helped improve my aim. Don't get that opportunity during the actual game.
I used to play for 30-40 mins a day, that wasn't sufficient time in game to improve. Especially against players who are playing for the better part of a day.