1. "sissy", "femboy", "trap", "futa" but mainly Female, are not made for Gay men. The main audiences are straight men with such certain fetishes.
Ofc there will be some gay men into that, but that' cuz they have those fetishes, not because they are gay.
2. Gay men are minority in real life. Ofc the number of above games will be way more than games made for gay man.
3. The whole line of argumentation you quoted is anger fuelled troll, really no point to feed it. (Yeah if you don't want someone to be mad at you, don't use words like " ACTUAL Gay" or "REAL gay".
1. and 2. are an incredibly problematic take. To properly address everything wrong with it you'd need to unravel way more than is space for here, but i'll try my best to point out what came to mind immediately for me.
Terms for sexuality are not very accurate because sexuality and the connected topics such as gender identity are all each a spectrum, not a checklist - the term gay is a catchall for all attraction to the same gender and cannot be used in the way shown here.
Sissies, femboys and traps are all male, both in body parts and in terms of self identification - if they identified as female, then none of the three would apply.
Attraction to them as a male thus means this is gay, no matter their interests in "traditionally female" topics or how they present outwards.
Denying this would lead to the conclusion that lesbians who are attracted to butch women are somehow not lesbian, rather "straight women with certain fetishes", because butch women often have interests in "traditionally male" topics and present more "male" than "female" - its in conflict with the very definition of the word AND the writings of most LGBT authors who have researched and written on the topic.
The men in ancient greek stories of pederasty, which are commonly used as THE example of gay people in antiquity in popular culture, also would not be gay if we applied the logic outlined in this comment as boys and young men do not have the features typically associated with "manliness" such as lots of bodyhair including beards, large muscles and overall larger bodies.
You can definitely be a gay man and only be interested in more feminine men, just like you can be a gay man and only be interested in hyper masculine men, thats simply the way the word is defined and you'll have to deal with femboys showing up under the gay term just as lesbians looking for femme content will have to deal with butch content showing up.
The statement that "[..]some gay men into that, but that' cuz they have those fetishes, not because they are gay." is thus simply incorrect.
Futa is a bit of a more difficult topic, however as they have male and female genitals, attraction to them means that you cannot be grouped under the term straight.
2. falls apart since 1. is already a completely incorrect point.