You mean like, as opposed to eating a bullet? Inertia, mostly. It's actually pretty hard to stop living. I do nothing, I wake up the next day. Lazy option for a lazy person. That and, as Arch put it, "pure bloody-minded stubbornness." Now that's a mindset I endorse.
I really empathise with your post, Julian. As a middle eastern trans man, I feel like social refuse sometimes too. It's really freakin' hard -- and that's just that single aspect. Personally, I spend a lot of time feeling like all I wanna do is claw my own skin off. I got a garbage brain and a garbage body, and it sucks, it really does.
For me, it's the intermediate goals that keep me going. That sounds dumb, but I don't mean short term like "next ep of tv" and I don't mean long term like "when I'm 50" so that's the best way I can think to phrase it. For me, it's my school. I want to graduate from this level of my education, so these next few years? That's what I've got. Working towards something is the most important thing in the world to me, and imo, setting up challenges to reach towards is the only way to get through the garbage. I need to have something to keep pushing for. But that's just me.
Do you have mental health support, like a doctor you can talk to about your depression and stuff? Doing anything at all takes so much herculean effort when you're depressed. If you're not on anti-depressants, I might consider that. Take the edge off. I dunno.
It does get better, man. I hate to say it because I know how it sounds, but it does. Working towards your transition gives you that "intermediate goal" focus and with each step, things get easier. You know yourself and you know what an authentic life is for you. That's a lot of hard work you've already done, and I think you deserve a lot of congratulations for that. Now, all you have to do is figure out what's next and start walking towards it. ("All you have to do" makes it sound easy, but of course it's not. It's hard as hell, but obviously, you've got a lot of fight. I mean, you've made it this far, right?)
Take care, dude.
And PS: that waiter was extremely rude.