I was in the same boat a few years back, I had an amazing job with great pay but wasn't happy. I had to force myself to give up on certain fun/costly activities so I could save even a little bit at a time. At some point for me, it was more about trying different things while I still had money coming. You seem to be having an early mid-life crisis! Might want to consider a career coach or a life coach, sounds strange but, there are some sites that offer great options like https://www.pivotplanet.com/
Good Luck!
Please forgive me if I'm brutal...
"I do not have hobbies": you're on HN... some call it a hobby!
"I don't really like anything": you probably like talking (you're here), software (who can write code without passion?), exercise (you do it every day!)...
"Trust me, I've tried quite a lot of things": the world has something for you. Find it.
"nothing seems enjoyable enough to stick with it": what would you do if... if you had that money, if you could do anything you want, if you could do something knowing you'll succeed anyway?
I do not have hobbies, because I don't really like anything. Trust me, I've tried quite a lot of things... but nothing seems enjoyable enough to stick with it. And I could force myself to stick with it, but, at that point its just work.