Is it wrong that I think my boss is horrible?
Why do you think your boss is horrible?
He knows nothing but threatens me about how I'm doing my work.
Some bosses are horrible and you have every right to think of them that way. My advice would be to keep it to yourself if you don't have another job lined up yet.
What do you mean?
If you believe your boss is horrible, that's okay. Just be sure to keep it to yourself so that you don't create problems for yourself in the workplace.