Don't take it personally.
Surely anyone who keeps up to date with the things that are happening in the world must be horrified at the terrible things humans are capable of.
I am also heartened by the compassion and empathy that is often shown.
Bringing it down to a personal level and not being paranoid, I have not had good experiences at the hands of other people. Now that I'm older, I've decided it's better to stay aloof.
So, it’s more like you don’t trust people, not that you don’t like people. There are some petty good people out there in the world. Some that I would even trust my life to. But, just the same, there’s also some that I wouldn’t trust either.