I really do try my hardest not to be a shitty friend. I don't say mean things about you, I agree with you whenever I can.
If I tell someone I'm mad at someone else, because of random things they do that are slightly annoying, like chewing too loudly, or talking in the movie theater.
I really do try to stay impartial to people's morals, upbringing, manners of speech, etc. They say mean things? Okay, I mean, to each his own until someone is really hurt.
So when you want me to agree to complain about those very things, I try not to. I try to see the best in people, because sometimes it's not their fault.
So don't blow up at me because I'm not angry alongside you. Especially when you're being a shitty friend too.