Every professional player is playing under pressure and they have to deal with that. Coaches and fans might accept a performance drop in a match or a two but Harry Maguire made serious mistake several times and damaged heavily the team. Sometimes you have the feeling that he is the player number 12 in ManU opponent team! I doubt he will recover and it would be better to leave the club. If he was a player outside of England, he would be kicked long time ago..