I think the hatred of rival fans has abated, but it's a simple fact that United are treated differently by the media, and that drives the narrative. There are almost unlimited examples of United players/coaches/issues being reported on and with an intensity that simply doesn't happen for other English clubs. That isn't my opinion, it's very easy to show the number of stories, clicks and so forth.
Similarly, I became a bit obsessed for a while on the Guardians reporting on United, particularly under Jamie Jackson. His articles are almost univerally negative on United, even when we were quite good. Similarly, ESPN's reporting particularly under Mark Ogden are an absolute sh*tshow of how bad can we paint united this week. Even when United win, the articles are about negative pieces of the performance, or Fernandes as a bad captain, or Rashford. While at the same time, there are about 4 pieces up there right now praising Klopp's nursery.
United are treated differently. I'm not sure why. But we are.