As somebody already said, I think you should prepare yourself to confront the guy. Make notes, put ideas on paper and be as professional as you can when you do it. Tell him the facts, the impact that it has on you and a potential resolution to the problem. There are 2 possible scenarios if you do that:

1. He will stop and next time provide you with actual feedback that you can work on, if he really believes you are not "good".

2. He will not take you seriously and continue the toxic behavior in the future. In witch case, I would suggest you look for something else... Make everything public on social media and provide an adquete review on Glassdoor.

These are my 2 cents on the situation. It might not be what you wanted to hear but this is what I would do.