Should I leave my fiancé

I f25 want to leave my fiance m24 for a multitude of reasons. I’m trying to convince myself that I’ve mad the right decision so I’m posting here. Over the last three years my fiance and I have had 1 children together and have another on the way. For the first year of our relationship things were ok. There were some red flags he always was very demanding of time and his independence and it was very harsh which is why it felt like such a red flag to me. I got pregnant a year into our relationship and my fiance wanted me to get an abortion I did not, I felt very forced into a decision I didn’t wanna make, I made the decision to keep the baby I told my fiancé he could leave or not and he chose to stay (I promise this is relevant) through my pregnancy he always promised me he’d change but he kept doing things that were just not in line with becoming a parent. He was very irresponsible always promised things and never did them, refused to make any changes ahead of time as he would “do it when the baby came” which never happened anyways. Flash forward to the birth of our son, he was immediately unhelpful from the start. One of my main memories of being in the hospital was him refusing to get up and help me wash pump parts which was his only job because he was too tired to do so. After having our son I moved into my parents house as not disturb my fiancé as he was bus finishing up school, and he barely visited even in the weekends and overall was not a very good father figure to our son. He was very hard to Bond with him which I understand can be normal for a lot of parents, but he didn’t really try much. The changes he promised to make when the baby was born those being: getting up in the morning, fix his sleep schedule etc as you can imagine did t happen. We broke up for a period after this as I was so tired of him being such an irresponsible parent. We got back together again and things were on for a while. Whenever I was around he would never call to check in on me or the baby he would just act like we didn’t exist and happily be a bachelor, this was the only time we ever got along and my fiancé was the happiest. flash forward to now. We have moved in with his parents to save for a house and things have gone down the drain, he goes to work brings our son to the park and then plays his computer games after our son goes to bed, stays up too late, late enough where I have to get up with the baby everyday. He doesn’t check in with me at all to see if I need anything a day to sleep in etc. he just lets me handle what he doesn’t wanna do. His parents have been quite an issue for me as they constantly tell me how to parent my child and my fiancé lets them he even sides with them most of the time. His dad is outright demeaning to me at times and instead of sticking up to him he typically will side with his father and demand an apology of me because “I’m the problem”. On top of this if there is an issue with anyone in his family and try to explain my side my fiancé will get mad at me and tell me that I can’t be defending myself and I need to admit to my wrongdoings, because HE thinks I did something wrong when I didn’t. When I stood up for myself to his father I got kicked out of his parents house, and yelled at by my fiancé for being unfair and was demanded to apologize and fix issues immediately despite the only issue being I asked them to take a step back and let me parent my child. On too of this when the opportunity to buy a house was presented to us (a more than Perfect opportunity ideal price, payments etc.) I was told not because he didn’t want “more responsibility” which is so immature especially given we have our own family, and I was told that because he makes the money he gets the final say in what we do, which is just outright controlling of me and our family. I have zero voice in this relationship, I’m not happy anymore and mentally and physically I’m not here, his touch almost repulses me, except for when I’m tired, and I just resent him most of the time. My heart keeps trying to make me stay because I do love him but overall I can’t do this anymore.

TLDR my fiance has failed to be the partner I need and the father my children need. He has continually given me reason after reason to not stay yet somehow I can’t seem to leave him. He is always against me and sides with his family. I feel like I have no voice in this relationship anymore and I don’t know what to do.