2014 car accident caused perminent brain damage?

This is an odd post, considering I used to adore Woods's acting abilities. However, his behavior over the last decade has been increasingly getting worse and worse and even resulted in him being supposedly blacklisted from Hollywood. I just discovered that he was involved in a 2014 car accident where his Jeep drove off a Colorado bridge and gave him a "severe concussion". It was around this time where he started going apeshit on Twitter and spreading alt-right conspiracies. He also hasn't appeared in a film since 2014. I honestly think the severe head injury at his age correlates to his career, or lack thereof, of the last few years. Thoughts?