How is he a terrible person?

Doing the wife guy routine and then cheating on your wife for months while selling your joint assets to support your addiction, and then finally abandoning her when you get someone else pregnant after you get out of rehab is generally a shitty thing to do. But YMMV

Because people developed a weird parasocial relationship based on his marriage and couldn’t handle it when it dissolved

He invited Dave Chappelle to open for him, allowed him to do a transphobic and homophobic stand-up set, and then hugged him afterwards.