How Do I Break Up With Him?

To give you some background: So, I have known my boyfriend for 8 years. We met in high school. Did not get off on the right foot. Eventually, we became friends etc. Earlier this year we actually reconnected over tinder and started dating. We’ve been official for four months now BUT there have been major red flags. He has a 6 year old (which I’m fine with I was there when he found out his girlfriend at the time was pregnant) but his maturity when it comes to parenting is lacking. He has been disrespectful towards my family and myself he doesn’t respect boundaries. He used personal info of mine as a joke to random strangers. When I tried to talk to him about some things that made me uncomfortable his eyes glazed over and he essentially turned into a 5 year old when I asked him not to do certain things. He sat there and pouted. He automatically assumed that I was breaking up with him. I told him that he doesn’t get to take that decision away from me or any other decision. When trying to fix that mess, he said “I can’t eat, I can’t sleep.” And when I said I want to work on it he was totally fine. Now he has some good qualities but right now it feels like the bad is outweighing the good. What do I do? I don’t know how to do this without feeling manipulated into staying. Help 😓

UPDATE:

We broke up yesterday. He handled it the way I expected. He didn’t want to have an adult conversation about it.