He isn't wrong per se. The sheer amount of online discussion and the level of media coverage that exists these days must make it inescapable, it can't be easy to deal with. When you're playing poorly in a big market, in big games while being criticized for landing cheap shots - I'm sure it takes a toll.
But, it's not too hard to see the irony in his concern for player's mental health. Trouba goes out of his way to hit his opponents in the head. CTE can lead to depression and suicide, and he's probably as guilty as anyone in the league at contributing to it. Who knows what the players he's elbowed in the head will be going through later in life.