I regret nothing. I'm so much happier here than I ever was in the Bay Area, and I doing this early in my life allowed me to have a lot of fun and stories to tell. Why would I "waste" my precious 20s and early 30s being miserable and retire at 35? Who even wants to retire? I wouldn't even know what to do with that money? Buy a house and sit in the garden the whole day? :) Not the life I wanted.
This whole "make a lot of $$$ and be miserable in your 20s to optimize for the future" is such a common thing I see in SV and HN as part of the narratives that these VCs are pushing. I think you have it all backwards. You can make money any time. You can never back to your 20s and 30s where you don't have health problems, are full of energy, and have an easy time making friends.