I get tired of noobtubers, but usually they aren't that good at it so the game is still somewhat interesting. Being spawn trapped is miserable, but I have only been spawn trapped a few times. It's livable, just finish the game and switch lobbies.
I don't usually get raped unless the other team is being cheap. It sucks, but not worth getting upset about.
What bothers me is boosting. For a while there, I wasn't able to play a single free-for-all match without at least one set of boosters. Overall though, it doesn't really matter. If you're tired of the people, leave the lobby. If you're tired of the game, switch games. No big deal.
If all else fails, there's a whole world outside of MW2.