You can go back and watch the game and see it almost every time he was 1-on-1 with a pass rusher. The pass blocking was terrible.
His only salvageable asset right now this season is run blocking, which he did well. But you don't want to leave him on an island with even an average pass rusher
He definitely looks like his feet are made of stones. It is a weakness. He uses his long arms and power in the run game, and he could be a truly devastating run blocker. The question is can the coaches teach him to use his strengths to limit his weaknesses.