His is the story of two careers. Up through 19-20, the year after his injury, he had pretty good advanced stats with favorable offensive zone starts (55% OZ - 45% DZ). Once he started getting used as a defensive defenseman (45% OZ - 55% DZ starts), his corsi and fenwick went from ~52-53% down to 46-48%.
Flawed that those stats may be, they tell a story here. He's an offensive defenseman who lost his hard, accurate shot, and so has been recast as a defensive defenseman, but he's not a natural fit at it. As such, he's going to either be a third pairing defender in the NHL, or a decent offensive defenseman in Europe. I'm afraid he's just about out of rope in the NHL, now. I really feel for him, he seems like a great guy.