I partially agree with you, his shortcomings are more on the people who hired him with no coaching experience, he's not like Carlos Beltran, he was out of the game for some years, they put him in an impossible situation
The reason the team won 100 games is more related to the current talent on the team than his skills as a manager. He's a smart guy, he will be better next year but I hate how he messed up some key decisions in the playoffs