Being a part of a clan/team means much more than play together, you learn (at least I do) new things (of any kind) one of them is certainly gameplay styles, so if you feel you are 'not at the level' then with more reason you should stay in order to improve your skill, I think one of the best ways to increment your level is to play with better players than you, I know this by my own experience.
Choose a better player than you, then equal him in gameplay, finally add gameplay 'things' on your own to be better than him. f you do it repeteadly you'll become a great player....my tow cents...
It's unfortunate you left us now, but I respect your decision and whish you success in everything you do. Good Luck Google.