> Also, you work at a FAANG, for any reasonable definition of success, you've made it.

Somebody here need to hear this:

You really REALLY need an identity outside of work. Having "made it" because you work at company X, your boss likes you, you got an award - these things are VERY empty and will contribute to depression.

Consider augmenting your life with some of the following: relationships (perhaps with God), hobbies, volunteer work, exercise