Hmm, they did. When I was in the very bottom of a pit, Wellbutrin gave me artificial energy that helped getting motivated in getting better.
Right now I'm on a lower dose of the same medication, and it helps stabilize my mood. I get fewer, and less extreme, weird unexplained depressed periods.
You have to know though that if your depression is mainly or entirely caused by gender dysphoria, it won't be too useful. In that case, I see it as... Yeah, let's say you broke a leg (gender dysphoria). It's really bad, and the bone pieces are misplaced. You can't even try to walk. Then someone brings you a crutch (anti-depressants). With the crutch, you could go to the hospital (work on gender dysphoria and possibly transition). But if you decide to just go home because with the crutch, you can walk... Your leg is going to have serious problems.
Anti-depressants are there to help control depressive symptoms. But unless the depression is strictly chemical, it does nothing about the cause(s). In the worst case scenario, it will mask the symptoms while the issue keeps growing in the background, and at some point tolerance to the product will appear and things will be much worse than before.
Aside from that, anti-depressants are a huge basket from which to choose. And rarely will all anti-depressants work for a given person. Actually, often, quite a few different kinds (and sometimes even combinations) have to be tried before something useful is found. So if one doesn't work, it doesn't mean none will.
Anyway, all that to say... it's probably not wise to be using anti-depressants just to be able to endure not transitioning. iamconfused, you say you're not being supported... Do you just mean that you're not getting help? Because if it's just that, it should be possible to transition. Or do you mean it's really bad, like, we'll kick you out if you even talk about not being a girl again? Even in that case, seeing a therapist should be possible and helpful, even if you need to give a false pretext for it.