Just a little observation...
I've noticed a pattern: The people who are angry, bitter, resentful, suspicious, and "entitled" seem to get a lot of real-time payback.
They find the hair (or Band-aid) in their food. They get the cold, soggy french fries. They always encounter the angry customers and cashiers. They get stuck in traffic more often. People actually do turn against them, and enjoy their misery-- or at least do nothing to prevent it.
Then they get even angrier, more bitter and resentful, and just more negative in general.
And they'll believe it's justified, never seeing the connection.
It's a vicious cycle. A trap. One I take care not to fall into even when things happen that might make it seem reasonable. Because I've watched people like this and I see what happens to them, and I don't want to follow in their footsteps.
It's better to learn from the pain of others, than to insist on trying every experiment on yourself.
And, sure. It might be confirmation bias on my part. But if it is, it's a useful one that helps keep me from being a jerk to those around me.