My biggest gripe against the idea of "nonbinary" is that, if you look at it closely enough, you understand that it's effectively a stop-gap measure by lazy people that want gender-nonconformity to be accepted by society at large but want to be shielded from any criticism while they try to change society.

I actually don't have any issue with the idea of gender non-conformity becoming, not celebrated, but tolerated by society at large. I know that it already is to some degree, but I think it'd be cool if no one took a second look at a man wearing a dress because that's just normal, you know?

The problem with "nonbinary" is two-fold: (1) see above; people are lazy and sensitive and don't want to "do the work" of being an outsider in society, so they've made up a special identity that isn't able to be criticized in order to deflect reality, and (2) reinforcing the idea that "nonbinary" is even a thing also necessarily enforces gender norms. So when you see people screeching about breaking down gender norms and then calling themselves nonbinary, all they're doing is shooting themselves in the foot.

Just be a masculine woman or a feminine man and learn to accept that you might have a tougher time in life until society gets over its prejudices. I can guarantee you that a masculine woman or a feminine man has it easier now than they would have 60 years ago. I know it sucks that you might not live to see a world where people don't give you the side-eye because you're a man in a dress, but you can't force social progress. That shit takes generations, and if you really want to make a difference, you have to be doing it for people two or three generations down the line, not for yourself.