Am I overreacting?

I need some honest advice if I’m being selfish or overreacting.

My husband and I had a baby 5 months ago. She is my absolute world and i love her so much. My husband for the first few months was fantastic. Doing the night feeds, getting up with her in the morning, playing with her ect... however he’s starting to creep back into his old ways again and he’s constantly playing on his PlayStation. I’m getting so fed up. He will leave her to cry because he’s too focused on his game, gets annoyed when he has to hold her because he just wants to play his game. I feed her, change her, get up with her, put her to bed 90% of the time and I have to juggle that with household chores and cooking dinner. I don’t trust him enough to leave her with him because I just feel like he will ignore her needs. A week ago I woke up at 3am to my husband jumping out of bed and yelled at my our daughter because she was sucking on her fingers. He got angry because he dropped her dummy and he shouted and kicked it across the floor and scared our daughter. I just wanted to cry that he could do that to her. I just took her downstairs and fed her and changed her but I feel guilty that he could do that. I was just so in shock! I don’t feel like I’m in a relationship anymore. I feel like I have 2 children. I could scream with frustration sometimes because he just doesn’t care about anything but that stupid PlayStation. He’s 28 not 14! I ask him to do something it’s always “I’m in the middle of a mission you know I can’t pause the game”

He promised me This wouldn’t happen. I told him when I was pregnant that I can’t do everything myself and that our daughter should come before his games and he was great in the beginning but now he’s just the same as he used to be. I’m miserable and I don’t know what to do 😞