Gender does not equal sex. Physically, I'm a guy, but I act like both a guy and a girl at times. Not following any extremes of either though.
the misunderstanding lies with you using the word "guy" as both a gender adjective and a sex adjective. The way you use "I act
like a guy and a girl" refers to the societal gender roles enforced on "guys" and "girls", but "Physically, I
am a guy" refers to what's in between your legs.
I don't think it even makes logical sense to call yourself "gender neutral". Colors are gender neutral, which implies that their properties can be applied to both boys and girls. This word can be applied to literally every human, as actions / statements / gestures are not binary male-female in any sense. As only very few actions are inherently "male" (like, actions involving the penis? even this is debatable) or "female", the vast majority of actions you take will be actions that both a guy and a girl could conceivably do.
Anyway, re: acronyms, yes, it's a form of "discrimination" in the most literal sense of the word. But, I can't agree with the concept that because an acronym necessarily distances us from others it is harmful or bad or alienating. To ignore the differences in life as a "queer" person and a "normal" person (SCARE QUOTES TO THE MAX) is equivalent to the statement that black people's lives are analogous to white people's lives in all aspects other than the very specific instances where their skin color objectively makes a difference.
Being a minority means that you are subjected to inordinate amounts of discrimination, ignorance, and hatred that just aren't experienced by a person whose circumstances are otherwise similar. Due to the unique situations and problems that arise as a result of being "queer", it is necessary to have unique and tailored support to fit the needs of specific people, and therefore a defined community of people is helpful. Would it be nice if society were such that we didn't need a specific acronym and group? Yes, but that's not realistic.
The purpose of the combined acronym is not to equate the hardships of all gender and sexual minorities, but rather to recognize that all gender and sexual minorities experience situations that are not analogous to those of a "normal" person's, and that they might need specific support tailored to those situations.