Yes, the more online hands per hour that sil693 mentioned is HUGE and the reason I think cash games are a lot more stable for mental sanity is because you go all-in a LOT more in tournaments than you do in cash games, so that feeling of villain always catching their card or bad beats is MUCH more prevalent. Also in cash games, they don't turn both cards over so even when you're all-in, you have no time to figure out what villain needs to catch or how far you are behind - it's win or lose. You have to go back in the hand history to try to relive the moment to see how ripped off you got.

The truth is, whether you want to believe it or not, you do NOT get drawn out more than any other player. You get drawn out the same frequency as everyone just the same as everyone does compared to anyone else. If you keep a database of hands, it's easy to check and you just have to make sure you play enough hands to see it even out.