In some ways you can't blame him for the immaturity he showed earlier. He was bigger, faster, stronger and a better runner than just about anybody in high school, the same to some degree in college, then when he got to the NFL he came to a team with a great offensive line, playing against teams that had never played with him before.
The world was his oyster, as the saying goes, why would he act mature? Yes a few do, like Emmitt, but not everybody is the same. He had few influences to show him how to act apparently.
But now he has, if his comments are real, we should all be supporting him, if for no other reason than he has matured as a man, not even accounting for the fact that his returning to 2016 & 2018 form will greatly improve our chances of seeing another trophy hoisted come February 13, 2022...