Why does it matter to Leafs fans so much that some people don't like Carlyle?
Carlyle has had success, but he's also been critique too. He will have players dislike him based on his style of play. It may not benefit him at all times, and will likely have some players do poorly under his system and coaching. But that doesn't mean he can't have a successful team.
Personally, I'd rather a coach like MacLean, who's extremely communicative, and the team knows exactly what to expect. And if they don't play well, they don't play as much, but the players know exactly what they need to do to play better.
People all learn differently and thrive in different environments. MacA and Ryan don't thrive under a Carlyle system, and Carlyle did nothing to try to make them thrive. It is what it is, and players will thrive under that system.