awful as in they're COD style annoying 12 year olds, or just non existent?
How does it compare to Dota 2?
Awful as in 12 year olds and lunatics who go crazy if you don't do exactly what they want because it is one of those games that really pushes competitive play.
I never got into DOTA 2 and ended up mostly playing Dominion in LOL which is like a deathmatch point capturing and holding mode. The people who play the DOTA style game mode are worse than the ones who play Dominion but it basically permeates the entire game. Like I said it is a good game you should try it but you will have a far better time if you get a couple friends to start playing it with you.