Take the money, max out 401k + after tax, save whatever you can after that, and get your fulfillment outside of work, just like the majority of other employees

Take the money, max out 401k + after tax, save whatever you can after that, and get your fulfillment outside of work, just like the majority of other employees do. After a few years, you shouldn't need your FAANG job anymore. If you wanted to work on something interesting, you should have stayed at a startup. You wanted to make bank, and this is the price.