Who’s in the wrong??

Any one else’s baby’s dad just will not help with the baby at night time?? It’s honestly starting to piss me off. Our son is almost 9 months old and his dad has NEVER gotten up at night with him and will not even if I ask, he just gets pissed off and will turn the other way and go back to bed and leave me up with the baby. I’m a stay at home mom 24 hours a day I don’t get breaks I have to clean the house up on top of taking care of the baby all day long and all he does is hang out with friends and play video games but can’t help me because he’s “too tired”. He was laying in bed I put our son to sleep and told him I was getting in the shower to make sure he doesn’t wake up before I get out he said okay, well I get in the shower and maybe 10 mins later I hear our son SCREAMING bloody murder I could tell he had been crying for a good minute for him to get to that point (I had the ventilator on as well as the shower but I had the door cracked I still couldn’t really hear) but I jumped out of the shower ran in the bedroom and our son is smushed up against the wall and bed frame crying his eyes out because he hit his head on the wall and his dad is laying on the bed DEAD asleep. I woke him up and told him to get tf up and he woke up snapping at me and said it’s MY fault because I shouldn’t have got in the shower knowing he was laying in the bed. His dad was literally awake when I got in the shower but somehow it’s still my fault he started cussing because our son wouldn’t stop crying so I went and turned the shower off grabbed our baby and sat on the couch soaking wet, hair full of conditioner, dripping everywhere, getting our baby wet, the couch wet, trying to get him back to sleep AND to top it off I’m on my period so I was bleeding all over myself and the couch because I couldn’t put him down to even put a tampon in. meanwhile his dad just rolled over and went straight back to sleep. It’s literally getting to the point where it makes me want to leave him because of how little he helps me with our baby. I might as well be a single parent I do everything myself anyways and it’s getting to be BEYOND frustrating for me because he doesn’t see it that way. Am I in the wrong for leaving him with his dad so I could just take a shower ?