Partner and I have been living together for 18 months (only officially since a few months ago but he bubbled with us for lockdown). I have two kids which aren't his. He does occasionally help with the kids but we keep that fairly separate so that relationship can develop slowly over time.
He works late (til midnight some nights) and generally isn't an early riser. This morning, I woke up and said I had a bad headache and wasn't feeling well. I got up as normal about 7ish and was trying to get things ready. I was struggling trying to cook breakfast, hang out washing, get kids to eat / dress etc etc. I came up and had a shower. He was still in bed at 8am just playing with his phone. He hadn't worked late last night and was awake. After my shower I told him I didn't have time to make a tea as I was busy and I felt resentful because he could see I was struggling and he didn't do anything to help.
His response is that he does help and that all I have to do is ask. It turned into a major argument with him saying he will leave if I'm not happy with him, he's not good enough and I keep having a go.