The bulk of the blame for Howell's 23' struggles fall directly at the feet of Ron Rivera and Eric Bieniemy for putting him in one of the worst situations a young QB has ever been subjected to.
Throwing the ball 50+ times a game behind a horrible O-Line with crap offensive weapons, no run game and a very limited use of play action.
SH needs to gain some confidence, develop some pocket presence, learn to trust his offensive line, he needs good coaching. Hopefully he's not completely shell-shocked.
Of course much of his 23' downfall was on Sam for poor decisions, but a lot of that was because he was running for his life. With good coaching, improved protection, elite weapons, a running game to lean on, new confidence and hopefully a defense to rely on, I think this kid can be a force in the league.
Winning solves a lot of problems and though he may not have shown it yet. I think Sam Howell is a winner.