They have been involved in so many shady things and have had such a "throw everything at the wall and see what sticks" approach it sounds maddening.
I think a lot of people working there just made the calculated decision that Meta being at the very high end of the compensation scale made it worth it.
Even if you are in the ML/AI stuff. You have to balance out that they were funding at a very high rate versus that they were funding the work for less than stellar reasons.