Hello Alan,
a move to the Premier League would be a bad choice in my opinion. Yes, the players around him and his former coaches were not ideal for his development, but the main reason why Max hasn't made it yet and will probably never make it, is his lack of athleticism. He's neither very strong, nor fast. Neither the Bundesliga, nor the Premier League are well suited for a player like him. He should try clubs like Sevilla, AS Roma or Napoli.