No one really hates him. We are fickle United supporting football fans on a relatively anonymous forum and we need someone to blame. Our two biggest rivals won the PL and CL respectively.
Lukaku and Pogba were big money signings who we thought would perform better than they have done. Both have wanted moves away. Lukaku also hasn’t done himself any favours either with his recent social media musings. I think it has been difficult for players to love playing for United of late for obvious reasons. The atmosphere in general around United has also turned somewhat toxic so their is a disconnect between the team and fans imo.
Scapegoat situations then become commonplace. We seem to hate most players on here if you read carefully .