That is a lot of words to say “they found out that the big tech executives had been lying to them about being family, changing the world. etc” just as much as their last employer was.
News flash, working in big tech is every bit as soul sucking for the rank and file as it is working in big healthcare, or big law firm, or <insert large industry here>. Nothing special about it, they are large publicly traded companies that have shareholders and investors to answer to as the number 1 priority.