I don't think internal company culture is the problem. The problem is that a lot of these companies' consumer products are based on the "attention economy", and

I don't think internal company culture is the problem. The problem is that a lot of these companies' consumer products are based on the "attention economy", and the market has finally adjusted to see these things for what they are (essentially a system to put more ads in front of eyeballs) and thus considers them "underwhelming". The "A"s in FAANG which aren't based on the attention economy (Amazon, and Apple until very recently) don't (yet?) have this problem.