Why is Joe Mixon under appreciated?

[TecmoBengals]

In the Joe Burrow era fans have praised him as the QB, Boyd/Higgins/Chase as the WR trio, McPherson and his strong leg, and some defensive players.

The OL and run game have been the perceived problems with the team. Thus, Mixon is not appreciated. I also imagine his off field choices make it hard for some people to actively root for him.