In my opinion dropping your star player isn't necessarily good management. Obviously, he'll get the praise because he has the balls to do it. However, good management would be changing Ronaldo's attitude. Ferguson knew the type of player Ronaldo was, and he has always had a attitude issue, or perhaps some would say arrogant? That's not exactly a criticism, since most players at that level believe in themselves quite a lot it does come across as arrogant.
I'd like to think it's a current tactical change due to him obviously negatively effecting the team. However, United have improved, but they still aren't a team that will be challenging for anything soon. The problem is more than Ronaldo.
I agree. We don't know the whole situation so it's hard to say what is right and wrong, but it's often that ego and arrogance that drives a lot of top level athletes and even musicians to get to that elite level in the first place. If you didn't have so much self-belief you probably wouldn't get very far. There's a line from Drake that says
I am the greatest and I said that even before I knew I was but I think he was quoting Muhammed Ali. There's of lots of stuff from Kanye West before he was famous that's ridiculously egotistical but it's their own self-belief and arrogance that is their fuel to get where they want to be. Obviously Ronaldo has a massive ego and probably throws a tantrum when he doesn't get his own way and that's hard to handle for a manager. You need to learn to babysit them because you can't just let them walk all over you or backseat manage, but you also can't give into their every whim. If a player is disrespecting the team or manager and not playing by the rules you have to bench them sometimes to show them who's boss.
I agree with Hilarious, it's just pretty much absurd for not letting him leave when he had the opportunity to leave, and that's all just so he could rot away on the bench, It would have made sense if they're actually doing very better without Ronaldo, then I'd understand the reason for not starting him, ETH saying he didn't want to bring him into the game that has been lost but brought in Casemiro and most disrepectfully to also play Martial who have been out injured for the past 5 weeks ahead of Ronaldo, it's just doesn't make much sense imo!
I don't think it would have come down to not letting him leave but time just run out on getting a deal done. Probably both the club and Ronaldo wanted him to go but their options were limited. Ronaldo would only go to a top tier club that is in the CL and there's not many clubs that can even afford him, and even the super-big clubs have probably already blown their budget on other players so can't buy him even if they wanted to. Also, Ronaldo isn't going to leave for less money and United aren't going to let him go at a bargain price so it's a catch-22. I'm sure they were trying to get rid of him right up to transfer deadline day and by the looks of it with Ronaldo not turning up for pre-season stuff he probably thought he was likely to go as well but deals probably just fell through for whatever reason. I'd be very surprised if he doesn't leave in the next window, though maybe there's still not many options as to who can afford him.