If making a 1%er's income and having status at a Silicon Valley FAANG company is a key part of your identity, then leaving will likely cause psychological damage. If you are able to dissolve that part of your ego first and then either keep your identity small[0] or replace it with something else you feel is just as important then you will be better prepared to evaluate other opportunities and places to live.

Perhaps first take a vacation to decompress and get perspective. In the likely event you still want to quit, cut back on your spending as much as possible. Create a plan and set a deadline and or savings amount where you will feel comfortable leaving. If this takes more than 3 years at $800k income you are doing it wrong.

A word of caution appears in the next paragraph as I write from personal experience. Long ago I told myself I will quit in 3 years based on my assumed savings rate. I then spent the next 3 years evaluating cities where I'd like to live, actively listening to people who have ideas in case they want to partner later, thinking up business ideas, etc. This secret mission gave my work/life a renewed level of enthusiasm.

Then the day came and I couldn't do it. I felt pathetic and I called my girlfriend to confess my failure during my lunch break. But she reminded me this is a life defining moment from which my ego may never recover. "If not today then assume never". So I quit according to plan that afternoon.

The highs have been high and the lows have been low since then but I have had a rich, full, and memorable life. It's still going great almost 2 decades later.

[0]"Keep your identity small" is a Paul Graham quote and great advice.