While it's understandable since "When you wish upon a star" is basically the Signature Song of the Disney company, Disney Animated Canon films are often generalized into only promoting the moral that a princess, or any person, just needs to want something hard enough and they'll get it. The Princess and the Frog seems to address this prevalent idea, and balanced it out with a hard work moral.
The same applies to the idea that all classic Disney cartoons are generally bland and cutesy stuff. Yes, there are a lot of cartoons in the Disney canon that fit that trope, but Walt Disney and his studio also made a lot of impressive technical innovations in the animation business. Look at all the details and realistic atmosphere in films like Snow White and the Seven Dwarfs, Pinocchio, Fantasia and Bambi and compare that to the art of most of their animation studio contemporaries, and a lot of the early Disney cartoons from the 1930s and 1940s have scenes that are pure Nightmare Fuel, almost on the level of a horror movie for adults.
The Little Mermaid got flak for Ariel striking her Deal with the Devil to allegedly chase her crush with the human prince, ignoring the fact she harbored a passion for the human world from the very beginning and, if anything, it was the actions of her Fantasy-Forbidding Father that pushed her over the edge, which incidentally, Triton himself tends not to live down.
Ironically, Ariel in the sequel isn't likely to live down her tactless Parental Hypocrisy. Then again, a crazy sea witch searching for your only child can do that to you.
For Big Hero 6, even though Hiro Hamada is a mostly nice kid, the fandom will warp his attempt to kill Professor Callaghan to sociopathic levels, even ignoring the part where he realizes his mistake and the aspect of Callaghan inadvertently killing Tadashi.
From Chicken Little, Buck will never live down being a neglectful parent towards his son and more or less not treating him very well, with people even suggesting he likes neglecting Chicken Little and making him seem like the villain. Despite the fact that he does genuinely love his son and shows signs of improvement later on, it was considered too little and too late, and therefore he will forever be known by Disney fans as one of the most problematic parental figures in the Disney canon.