Getting into FAANG is hard age, and IQ aren't related. I know many engineers tried several times (more than 5 times) to get there.
understanding why that is happening is the most efficient way to help yourself to get your dream job. here are some points that you have to consider:
Are you developing in your current job? if not you should quit and work on something that gonna add to you.
Is your current job/experience wild in too many things? Try to deep dive into one area.
Are you in good mental health? be prepared mentally it is tough to handle FAANG interviews and failures.
Are you well prepared for the FAANG interview process? practicing every single stage and showing confidence is important.
Lastly, I found the (5 easy, 3 medium, 2 hard ) approach for each leetcode topic is really helpful.