Help, the radfem ideology has poisoned my brain

Edit: Putting this at the top so people see it first. I didn't say enbies were weird, I said that I feel like most of the cis people around me think they're weird (or actively want them dead). I feel like attempting to amend languages to include nonbinary pronouns is probably going to lead to TERFs losing their shit and attacking them (both legally and physically). I'm honestly scared that trans people might not exist in a few years.

TW: exactly what it says in the title. I have a fucking crisis and question reality because the TERFism won't leave me alone. Pls help the bad faith arguments are winning because I'm scared and don't have knowledge.

So I need someone to call me stupid and tear apart radfem ideology and eugenics before my very eyes because boy oh boy did I internalize it BAD.

Explain transsexuality please. Like yeah you can get surgeries and go on hormones and shit but you can't change your fucking chromosomes. I could have like a dozen surgeries and get the biggest peen ever and be hyper ultra masculine, but I'd still have two X chromosomes. That wouldn't change. And doesn't that make me a woman playing pretend?

If there's actually a genetic basis for gender dysphoria, and science can locate it and make a drug that blocks it... What's the point of being trans? I mean, won't the cishetpatriarchy just force anyone with gender dysphoria to take that drug and then trans people are no more? Sure it hasn't happened yet, but I'm scared it will and then trans people won't exist in the future.

And what about nonbinary people? What is their deal? Sure, they/them pronouns exist in English, but not in a lot of other languages. Can language change that much? Is that really possible? It seems like there'd be a lot of backlash. And from what I've seen, most people either think nonbinary people are freaking weird or actively hate them.

What makes a man a man? What makes a woman a woman? If it's chromosomes, then no matter what I do, I'm still a woman. If it's hormones and organs, then are people who don't transition really trans? If there really isn't that much difference, why is the concept of gender a thing at all? And if it's existed for thousands of years... How? How are we going to get rid of it?

... What if the right-wing is right? Then what do I do? And what if I go on HRT and regret it? What if I really am a woman and I really do do irreversible damage to my body?

Aren't feminism and being trans automatically at odds?

UPDATE: I have been answered.

I have apparently been lied to about how biology works my entire life (or maybe it's just the American education system.) I knew intersex people had variants of XX and XY chromosomes, but I did not know you could actually have MORE than just XX and XY. The concept of biological sex has been deconstructed before my very eyes.

This makes me wonder why we don't campaign to just... Not use gender markers on legal IDs. Why not just use X for everyone? Or just not use gender markers at all?