Let's someone treated me badly. He broke my cup on purpose, and I am indignant at that. How to describe that behaviour that caused me to be indignant? Can I say that that person's behaviour is bitter?
I would suggest Aggravating
But I can think of a few other words too, such as:
But I don't think Bitter would be the correct term. In fact you would be more likely to be the one who is bitter in this case.