[rt2016]

I don't think being at a startup is what I would consider "financial security". There's still 2 years until the stock vests, and even then it may be worth less than if OP had left and worked another job for 2 years. But I agree with your sentiment, it's better to be happier and have a more fulfilling job if you can afford it.

[SherlockeHolmes]

true it's more about sacrificing the possible payout if/when the company exits, which obviously can set you up nicely down the road to do the things you want and have a happy life.