Virtually everyone despises Mickey in KH but let's think about what the writers could play with.
This little mouse abandoned his home and family to fight for worlds not his own, continuously "fails" to save his friends no matter how hard he tries to protect them, willingly allowed himself to be trapped in a terrifying hellscape with no sure way out (and himself remained behind longer when Riku escaped...I will forever believe this was intentional so he could keep looking for Aqua until Riku desperately needed him), and was ready to sacrifice his place in the story if it meant connecting his friends back together with what little light he had left.
I stand by the opinion that the animation does him no favors, but ALSO that they need to stop abandoning every characters' development for Sora's. Yes, he's the main character. But so many moments that should have belonged to other characters were trashed in place of Sora saving the day.
Despite the general hatred of him because of his apparent place as Disney's "mascot"...Mickey is a really interesting character with a lot of very human tendencies. Most just don't take the time to look any deeper than what the games show you...which isn't much.
I just hope if we do get an anime it does my mouse boi justice, and lets us see more than one side to these stories.