Disney did not design Frozen's characters to appeal to men, which is fine because it's a kids' movie

And yet The Evil Queen in Disney's Snow White was very appealing to men, despite that being no less of a kids movie.

Some people don't have boobs,

Which is exactly the point. There is no need to demand for fiction to be representative of reality.

some characters don't have boobs

I meant boobs in a more metaphorical sense. Obviously there's more to making females look good, but I'm not artist to fully grasp and articulate them, so boobs are good enough of a proxy to convey the sentiment.

Look at all the "flat is justice" cries involving characters that are still very much appealing, despite lacking literal boobs. And then look at how carefully Elsa was designed to be so consistently off of what might be considered attractive, yet not so much as to be considered ugly.

Do you think it's coincidence that Disney's newer animations (Tangled and Frozen) look so shit when their earlier works (even as late as The Incredibles in 2005) were graphically so stellar?