Thats because some people don't have a way to describe themselves.
If you don't like the LGBQA+ community because there are serval different genders that don't make sense to you, then just focus on your own little bubble, but still respect people with different beliefs of gender.
I've seen the argument of that there is a lot and they don't make sense, you can still educate yourself! Some people of those "trillion genders" don't understand it themselves, but it makes them happy.
If you are confused, try https://www.reprodukasi.org/en/understanding-lgbtq#:~:text=While%20sexual%20orientation%20refers%20to%20how%20someone%20is,terms%20which%20included%20other%20communities%20in%20the%20LGBTTTQQIAA.
But don't say you don't like something because you don't understand it.
Thank you for your time.