Why is my boyfriend so hot & cold

Recently we’ve ran into more than a few bumps in the road 4 months into our relationship. I’m dating my high school friend, known each other for 11 years. Our relationship was great in the beginning & our friendship was amazing we have a lot in common but here lately things seem so different. For starters I have a 3 year old from the previous relationship. I’m also currently living with family due to Covid & personal reasons & living with my family is extremely stressful so idk if that is a contributing stress on our relationship he practically lives over here with us at this point but anyways the first bump in the road was he doesn’t like my parenting. He says I’m too easy on my child. She has rules, & discipline but I don’t believe his way of parenting is the right way either I told him he likes to Sergeant kids & he says he’s strict. She’s 3. So he ignored me for two days & then admitted he was wrong & was sorry. I’ve been fighting depression here lately really bad I won’t describe how bad it’s gotten but during those two days he ignored me I couldn’t go to him for help because he wouldn’t talk to me. I also just got over stress induced hives that put me out of work too. I ended up going into a very dark place where I wasn’t mentally there. He never came to me & ask what was going on because he was “afraid to make me more mad”. We made up talked everything out & was able to come to an understanding. Then the next issue was he was sexually frustrated because I’ve been sick, depressed & recent disagreement we obviously hadn’t done anything so we finally did the deed & here I was thinking everything was getting better he comes to me yesterday saying he’s still very sexually frustrated that he needs to let it out more by going harder & louder & to let his anger out that the little thrusting didn’t do anything for him. Living with my family I don’t like to do anything loudly. He wanted it last night but i was overly stressed from dealing with my family, my 3 year old being difficult, him getting out of hand & yelling at my 3 year old as well, which we almost fought over but he apologized. So I was exhausted & had an upset stomach from the days events. So I told him I’m not in the mood for sex he got pissy, & pouty & the fact I didn’t laugh at his as he calls it “being a dick joke”. So now today he’s not talking yet again. He’s just pouting & sulking. I already know what I need to do but I just wanted to rant for a min. Crazy thing is he’s usually extremely sweet to my child & me. My child loves him to death & he wants to take on the father role. My mom thinks highly of him besides his immaturity. If you’ve made it this far thank you for listening.