Being flirty or loud or a partygoer while being gay is pretty queer in a way, because instead of trying to subvert stereotypes, they embrace those parts of themselves, because they're not inherently bad.

"Being loud, overly sexual, and partying are inherent parts of the gay identity and gay people who aren't like that are suppressing an inherent part of themselves and aren't as gay as gays who do have those qualities."

It's just regular homophobia.

Acting super faggy is a rebellion against transmisogyny and the related idea that gay men should be just like other men.

Holy shit they know. They said it out loud. "Trans women", the actual face of the trans movement, the people that transsexuality was invented for, are just gay guys who can't accept themselves. And this commenter also surely believes that heterosexual transsexuals who don't have naturally feminine mannerisms and voices are inherently no different from homosexual transsexuals, except the heterosexual ones have "internalized transmisogyny" as opposed to just being naturally masculine.

Then on the other side...

It's r/gaytransguys, so we can assume that the vast majority of users there, definitely this commenter, are straight women. This is a continuation of "gays just act 'faggy' on purpose". Heterosexuals are convinced that homosexuals fake their mannerisms and voices, despite the fact that what they see is usually a great attempt to hide said traits. And then of course some straight-leaning bisexuals will jump in and tell these heterosexuals (or in this case, heterosexuals will infiltrate on their own, it's just a problem of their kind convincing themselves they are the same as us and interpreting our identities through their prism) that "yes, I'm the gay(/lez) expert and they're faking it! I also fake it too to fit into the group sometimes, but I don't understand why they put on a voice and act camp 24/7 and I don't respect them for it and neither should you! Gay expert out! Duces my het allies, I'm back to degenerating a community I don't belong in. I'll be back to tell you how horrific they are another time."

A comment I picked to prove my point, but you need only scroll. Keep this pattern in the back of your mind, and you'll see it everywhere:

It does sound homophobic, yes, the problem with faggy "mannerism" is a widespread one in this world, it's common in the LGTB+ community to think gay dudes are super privileged but they way of acting and being is still the butt of the joke. You are definitly allowed to not like them, to not like anyone or to only like "masculine" dudes but please don't equate faggotry with cisness: all those "mannerism" can be displayed by trans dudes. Any of those cis gays could have been transmasc and stealth. You don't have a problem with cis dudes, you have a problem with the "loud-type" gay and that problem is not about they being the dominant culture, it is the other way around

These people don't have a clue what's inherent and what isn't. And their opinions on that change like the wind. If a straight girl likes hanging out with a bunch of campy gay dudes who like to party, it's inherent (because they should all be like that and stop suppressing their inner gay bestie side and be her emotional cum rags and party with her and allow her to sexually harass them. Woooooo girlboss), but then when the gay dudes don't like them, they say it's annoying and they're all faking it and need to stop, and she wants them all to channel their inner manly man side and be her big man so she can be sexually attracted to them.

These people see gays as nothing but something to use. And as soon as gays don't serve them, they lash out with homophobia. The only value gays have to these people is what they can do for them.