"staffed with below-average IQ people" I'm not sure why your co-workers' IQ is your concern. To come out of the gate with a comment like this sounds like you have a strong disdain for them. Part of your reason for joining the company was the paycheck. I assume the checks aren't bouncing. My advice is the same advice I would give to many people: Learn from your coworkers. Understand the problems that the team and the…
Not to mention "so what if the iq is actually low?". These folks have passed the same bar the OP has. Now they have to work together with existing team and achieve what progress can be achieved. Anecdotally, a lot of engineers (and especially managers) have this mentality where they don't treat the job as something that puts food on table and helps the company move their products forward in what ever pace the overall…
The notion that any type of consistent "bar" exists for hiring at FAANGs is a myth. These companies are far too large to consistently apply hiring standards. Some teams intentionally have different standards, some teams unintentionally (due to the hiring managers or interviewers just not being on the same page) have different standards, even within their specific team. Some teams are so desperate for people that they'll hire anyone with a pulse, while others are so flooded with applicants that they don't hire anyone unless you have 6 PhDs and won a nobel prize.
At my FAANG, it's so well known that the "hiring bar" is bullshit that when someone wants to do a team transfer, we usually require them to go through a full hiring loop again, just like an external hire, because there are some teams/organizations within my company that we do not trust to have upheld a reasonable bar when initially hiring someone.