Oh agreed it's super frustrating. A lot of times you won't even get any feedback with the rejection, which is incredibly demotivating and tbqh, infuriating.

> you can theoretically interview at each of the letters in FAANG every year

One of those letters will let you interview many times in a single year ;) (but not for the same role on the same team)

If I had any final advice for those intent on going through the interview meat grinder it is that while l33tcode can be useful, you'll still want to understand some of the why behind popular algorithms and not just have a ton of specific ones memorized. This will save you when you have to talk through a problem you're not already familiar with.

Skiena's The Algorithm Design Manual was more helpful to me than any other prep material in that regard.