Good points! I also think that John knew bringing Yoko into meetings and recordings would annoy the rest of the band but did it anyway as if to say “what you gonna do about?!” I think like any other relationship, when you’re with people for so long, working together, they we’re probably just sick of each other. I also think Brian Epstein’s death was a big part in them breaking up too. May have been some tension on who would “lead” the band after.