Jace Beleren hate
All snark aside, my problem with Jace Beleren is that he is the MtG equivalent of the Ready Player One protagonist.
He is there to act as the stand-in for the stereotypically nerdy cishet men that MtG considers their audience. The fact that he's suffered no real repercussions for his loathsome actions (aside self-pity), waxes poetically about how terrible his life is despite being hailed by Azor (the lawfulest and goodest sphinx of all) as Ravnican Jesus and has a string of Hot Potential Girlfriends fawning over him every damn story is just more proof of his status as Ready Planeswalker One.