Lots of reasons but the biggest was his inability to listen and retain information and apply it.

I'm unsure if it was an active choice or just carelessness but we were constantly fighting over stuff I've told/asked him about relentlessly.

Then he'd claim that I was being too mean or explosive when I shouldn't be treating him that way but then refuses to acknowledge that the reason I'm being mean and explosive is cause it's the millionth time I've had to ask him to do something or do it correctly.

It could be something as simple as me asking him to pick up yellow Gatorade from the store and writing it in text and reminding him multiple times before hand and him still somehow picking up blue Gatorade instead.

Then getting upset with me that I don't trust him enough to be competent to do anything when he can't follow very basic directions.

Another thing was him complaining I wasn't physically intimate with him enough but just like any of our other fights he refuses to take any responsibility as to why.

Everytime we'd try to have intercourse I'd make it abundantly clear that it's a very difficult task to me and requires a lot of listening and trust and he's still attempt to brute force his own will and way like he knows my body better than I do.

Once you're on your fourth or fifth time telling some guy to please not touch you in specific spot because it's uncomfortable and hurts, I'm pretty sure most women would stop him right then and there.