I used to have a really hard time not hating people. It was always easier for me to run to judgement and decide that someone was disgusting and worthless rather than try to see things from anyone else's point of view.
Now I don't find myself angry, but more so apathetic towards everyone. People are always going to disappoint you no matter what. There's never a rhyme or reason to it.
I think I've just had the misfortune of meeting all of the most fickle and indecisive people there are.