Leroy Sane is certainly a very talented footballer. But he doesn't have the consistency to showcase his talents. If he wants to play for a team at the level of Bayern Munich permanently, he has to show consistent performances. If he doesn't accept Bayern Munich's conditions, he will continue to have the same problems in teams at the level of Bayern Munich.
Leroy Sane is one of the player that always draws my attention in Bayern Munich because he is such a talented player, though he was not too consistent this season as he was in the previous seasons but I wouldn't totally blame him because we all know that at the middle of this season Bayern Munich was actually going through a lot of lapses and it affected the whole club performance even to the extent that most people was saying that Bayern Munich made a wrong decision in signing Harry Kane, so there is no way those lapses will not affect Leroy Sane, so actually just like you said I would always prefer him to stay with Bayern Munich because among all the club he has played Bayern Munich is the club he performed more than every other, so hopefully he will certainly improved from next season.