Are Monks Overpowered 5E?

Monks are totally op, until they get hit by ANYTHING.

Are Monks any good in 5e?

It's a very good and fun class. If you're looking to put up the most damage in a round, pick a barbarian and take GWM. Monks aren't for you. If you're looking to have interesting and effective options in combat but still want to play a martial class, monk is a very good and fun option.

Are monks op?

Monk isn't really OP, not even the best class. Their multiple attacks should be dealing significantly less damage per attack than the attacks of other frontline characters.