There are people still actively rooting against him let's not pretend otherwise and we all know why that is.
Yes... we all know why! It's staring us right in the face.
It's because...
Marvin Bagley is worse than a bust! He's a Wiggins-class franchise destroying torpedo! He won't bumble and stumble around like a bust and he'll past the eye test to a certain extent, but he's our Wiggins. With a bust you can tell he sucks right away and cut your losses, but Bagley has enough counting stats, highlight plays, and potential to dedicate coaching, money, and playing time to a net negative player. And because of this, you know the fanbase/media is going to fling back and forth on the whole "Is he good? Is he bad? shtick". Gross.
As for why, well it's what I said on another thread.
"Same thing with Bagley; you can be athletic as hell, you can have expert body control, but no one posts-up or faces-up their big anymore, especially their 4. The moment you try you're already losing."