"In the US you cannot make jokes about failure"
There is also the phenomenon that serial failure Donald Duck is still a very popular character in several European countries, while we don't care about Mickey Mouse at all. Isn't it the other way around in the US?
Mickey always does good and always wins, that's deeply boring. Donald is flawed and relatable.
I don't think many people care about Mickey as a character. They like the image but that's about it.
Interestingly growing up as an American, I watched Duck Tales which while tangentially related to Donald Duck it’s about his ultra rich uncle going on awesome adventures and just being so smart and awesome. Donald shows up every once in awhile but I don’t really remember much about him.