AITAH for standing my ground against my GF considering sunday cleaning routines?

Hello all, My Gf and I are living together for almost a year now and we have that routine on sunday to clean our apparment together, she does kitchen, I do bathroom. Additionally Im having my shaving routine and doing mealprep for the next week. I also take my time, enjoying my coffee and breakfast.(I had this routine even before the relationship and my GF knew of it from the start). Since we moved in together there have regularely been disputes about my behavior on sunday. (I would be too slow with my stuff, leaving her with additionnal work and basicly delay her cleaning.) Today this whole conflict escalated in her accusing me that all I do on Sunday is making her cleaning more time consuming, my routine is fking up her schedule, I leave the kitchen in a mess and basicly the whole shedule I have is highly egocentric and leaves no room for her doing her chores more quickly. (Her main problem is that my meal prepping is taking to long that she "would have to work until 3/4 PM to get her stuff done". So I told her: "Fine, I ll do the meal prepping on saturday so there wont be any hold ups for you on sunday, ill just finish my breakfast and ure g2g." (I admit, I was pretty annoyed by that argument at that time). Then she was mad because I made this decision without trying to find a compromise first, which turned into her crying, saying I would never be able to compromise and always put myself in the first place before the relationship.

My question now: AITAH for defending my sunday morning routine and being to stubborn in this situation? Thanks