Well, if you have to stop, then by all means don't do something you aren't enjoying. I wouldn't keep thrusting my fist into a meat grinder, so I don't blame you.
But, as a part of the INTERNET, you are going to have to deal with stupid or ill-experienced people. Usually, once every other game, I get someone who has never played a normal and just runs around doing whatever. However, with enough instruction and advice, you can help then turn around a bit. That happened to me a few days ago. We had a Teemo who had no idea what he was doing - I suggested he not build HP .. >_> .. and to build a Malady or Nasher's and go push top while we kept them at mid. Guess who saved the game by taking their top inhib and 1 nexus tower (Ya I know, they should have backed, right)?
It's not all about you victimizing yourself saying things like 'I will have to stop playing'. What separates you from the others is your willingness to HELP the incompetent players become competent.