I first attempted when I was 15; I'm 49 now. Ten years ago I would have said I was happy I hadn't succeeded at 15. Now I'm not so sure.
I suspect the "do you regret not succeeding?" is a fraught question, and the answer will be entirely dependant on the current mindset of whoever you're asking. I've had very, very good times in the years since I first attempted, but here I am now, after a downturn, and it's easy to look back and say, "well shit; I should have tried harder back then."
If you're asking for yourself whether it's worth it to stick around, that's a question only you can answer. The people here will, by our nature and our current wretched predicament, give you a pessimistically skewed reply --but that doesn't mean we're right.
I would personally say that if you're even asking that question you have uncertainties about whether to die now and the answer is yes, it's worth it to stick around until you have NO doubts about ending your life.