I too have been applying for some time 8th application (2014 at least)...
I've been interviewed twice, had recommendations, helped a few YC companies and worked with a few YC companies.
The fact is, it appears YC's goal is to put fuel on the fire. You have to have something people want, or you have to be onto something they think people want. In addition, you are their product, so you have to be something people want as well.
They didn't accept you and your startup failed (different founders, companies, etc.) means they were probably right - likely not far enough along. I too have had my set of failures and each time they were right to reject me. Each time it's improved my business and although I haven't shifted businesses completely (and I'm sticking to my long-term 2-year plan). I believe I'm on the right track now and will apply again. Because as you said, "fuck it." The real trick is not really needing YC in the first place to succeed and that's when you'll be accepted.
One thing that's different for me now, is although I'm a solo founder, I have experience, a team of seasoned entrepreneurs advising me, some income.
I always tap my network, and I'll buy them all lunch, dinner, coffee or beer if I can. I also return the favor where I can. I intro startups to other founders or companies I know wherever possible. I assume, that we'll all pay each other back eventually, and I know I've brought in large contracts from my introductions - so I assume they've been happy to review my application.
Reach out and I'll be happy to review your application. Perhaps one day, you can return the favor as well :)