No alternative, or AFAIK, no better alternative (yes I've experienced other style of interview like take home test, project, trial work, etc, all bullcrap). Keep doing it. I'm at my 300th Leetcode questions now, I just need 700 more (half joking).

Jokes aside, my point is, you can only get better, and when you get better, a non FAANG interview is actually a piece of cake, and you can just job hop every year until you maxed out your salary band, rinse and repeat.

Repeat after me: It can only get better, and one day you will actually conquer FAANG.