I find that when people complain about new words, it's because they themselves don't experience the concept that the word is describing, so they think it's unnecessary. Their own world is neatly described by words that already exist, and if something doesn't exist in their world, then they think it doesn't exist, or is not significant enough to have its own terminology. People's worlds tend to revolve around their own experience, and they often have difficulty imagining that other people have completely different inner worlds from theirs.

I use 'asexual' for myself. I've not even heard of 'queerplatonic' or 'zucchini'. But even with asexual, a lot of people who are sexual (particularly heterosexual - as they are the 'default' group which regular language encompasses) simply don't understand it. They are convinced that if they experience sexual feelings, then everyone does.