Aaaand there we go.
It certainly seems from your description that the folks at this store are jerks, but then again this comment makes it seem as though their behavior toward you might be explainable, if not justified.
You've read the Player's Handbook, right? Especially this part?
"You don't need to be confined to binary notions of sex and gender. The elf god Corellon Larethian is often seen as androgynous or hermaphroditic, for example, and some elves in the multiverse are made in Corellon's image. You could also play a female character who presents herself as a man, a man who feels trapped in a female body, or a bearded dwarf who hates being mistaken for a male. Likewise, your character's sexual orientation is for you to decide." (Player's Handbook, p.121)
This is a pretty explicit statement of inclusiveness and tolerance when it comes to gender and sexuality, and
there was an entire thread here in the ENWorld 5e boards that was discussing the degree to which that phrase was serving as motivation and invitation for gamers who identify as trans-gender, as poly-amorous, or even as asexual that the game acknowledges that they exist and might want to engage in some of this 'role play' stuff that's been around for decades. Sadly, that thread got derailed and it was shut down. (Note: this is not an invitation to start up that discussion again in this thread, merely a point illustrative to the original poster.)
The Adventurers League has a goal of being inclusive and welcoming, but it's a two-way street; the people being included must be welcoming as well. Walking into an existing game and insisting that the game be run according to your personal rules of decency and organization is simply not going to end well for you, regardless of the nobility of your intentions.
This seems a bit excessive -- you'd be better served finding a different group that matches your outlook than in giving up the game completely. But it's ultimately your call what you want to do with your time.
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Pauper