Are your SO’s helping as much as they should? Am I being petty?

Someone tell me I’m not alone here. My boyfriend isn’t putting enough effort in. He’ll go a few days where he helps more than enough, but then he regresses until we get into an argument over it. Today, he regressed. He invited his brother over and they spent basically the whole day in our bedroom working on music (they both like to write music). He came over around 2pm and he’s spending the night, so it’s been an all day thing. Since he helped so much yesterday, I didn’t complain about him spending a lot of time with his brother. But then it was time for me to cook dinner, and he didn’t even offer to watch the baby while I did. So, I cooked while wearing the baby to keep her from getting fussy. She napped in her bassinet while we ate, and as soon as we were done eating, she started getting fussy. He didn’t offer to help with her. Then, he started on muffins for us to have for breakfast while I fed and changed baby. He gave up on cooking those and left them for me to finish so he could go back to working on music with his brother. At this point, baby was getting fussy so I was juggling her and finishing his damn muffins. When those were finally finished, she started having gas pains and was crying loudly. He didn’t even come out and offer to help until she’d been crying for over 20 minutes, and by that time, she was starting to calm down so I got a little snappy and said I didn’t need any help anymore. So he stomped out of the room and back into our bedroom and slammed the door and yelled ‘ive been up for over 24 fucking hours. I’m just exhausted’. He works nights so he sleeps from around 9am to 5pm usually, but he chose to stay up so he could work on music with his brother. So it’s not my fault whatsoever that he didn’t sleep.

About an hour later he came out and I’d already gotten the baby to sleep. He tried to take her from me then and I told him to just leave her (she was already sleeping, why move her?) and he got pissed off and went to bed.

Should I have to ask for help every day?? Shouldn’t he just step up and offer to help since it’s his kid too?? Or am i just expecting too much out of him?