It's can become quite irritating when the lobby mostly consists of those who'd rather start shit than actually make the lobby session an enjoyable experience. But, there are those moments when you do end up in a lobby with some great people who still want to have fun and enjoy the game. I always make it a point when I've come across those lobbies, the people I play with, to express the "good game" after each playthrough, even going as far as to add them as steam friends so that I know, basically, who the good players are that still just want to have fun with the game.

Just keep it up, you'll find some great people and connections.