There are a lot of men in this film, and the vast majority are not conventionally attractive. This could perhaps be overlooked, if it weren't for the fact that Mulan's eventual love interest, Shang, is clearly meant to contrast the other men. Shang is tall and handsome, with a pointed nose which gives him more European features than the other men who are portrayed with rounded, flat noses. Mulan's father is an older, distinguished gentleman who, much like Shang, is portrayed as being tall with a more pointed nose.
This is especially distressing when you look at how Asian men have historically been emasculated in Western media. Eddie Huang, author of Fresh Off the Boat, wrote an op-ed in The New York Times about the stereotypical portrayal of Asian men in media. Huang said "every Asian-American man knows what the dominant culture has to say about us… we're naturally subordinate, our male anatomy is the size of a thumb drive and we could never in a thousand millenniums be a threat to steal your girl."
In portraying Shang with European features, Disney sends the message that Asian men aren't desirable.