There's a difference between unhappy and negative. Negative is much more difficult to be around than unhappy.
I'm an unhappy person. To the point that it's a medical condition, "dysthemia," which means my normal mood is being a bit of a sad sack of shit. I date lots. I also date depressed people.
Couple things: anti-depressants don't "juice you up." They're not for everyone who suffers from depression, certainly, and if you can get better via exercise and such that's even better, but I'm guessing you might not have haven't tried them if that's how you're describing them. For most people who use them, they keep you at your normal level of mood most of the time, and make it more rare that you hit a point of outright misery. No juicing, no huge personality change, just medication to address an illness you may have. I'd strongly suggest you talk to a doctor and try them if advised, if you haven't.
The other thing is that, when I was younger, I despised the shiny happy people. I felt alienated from them and like they didn't understand the world like I did. Then I got closer with a few of them, and found out about some of their struggles with despair or suicide attempts.
The thing is, staying active, trying to concentrate on the good parts of life, not constantly bitching, trying to do kind things for people, trying to smile, those are all more important for unhappy people to do to try and get a little better and keep our heads above water. Personally, I find CBT techniques extremely useful to combat my own negativity. I fuck it up all the time, of course, but I'm trying because it's try or kill myself and I don't want to do that to my family. Now people who don't know me well mistake me for one of the shiny happy people, and I don't mind too much. They see me trying, and they respond to that part of me, and that's ok.
I think sad people who obsess over the hopelessness of the world and the bad things in their life are extremely difficult to be around, whether for friendship or dating, particularly if they blame external factors. That's the side of yourself you've shown here, OP, but I'm guessing that's because you're using this place to blow off steam and it's not how you are all the time.
You can be unhappy and not a yawning pit of despair. That's a perfectly dateable way to be.