Babies don't misbehave, they just behave. There's no such thing as a baby being "bad" because they don't understand cause and effect at first and have no concept of others feelings for a while after they do learn that.
A baby is never doing something to upset you. They don't act up to piss you off. They act in the only way they know how, and yes, sometimes the behaviour they're drawn to isn't great! That's why you guide them and comfort.
It's okay to be mad, but you need to remind yourself of this or you'll become resentful. Babies don't misbehave.
