I had a completely different interpretation of the incident at Facebook.
He had developed some key features that were now important. Instead of mentoring him to work better with others, his boss demoted him.
The boss was giving someone else a favor, making them the lead of this now-important project, some up-and-coming hotshot. He made up an excuse about "bad attitude", while just using it as cover for backstabbing him.
The OP probably had big $$$ in unvested options, so he had to play along and play nice, instead of quitting on the spot.
He had developed some key features that were now important. Instead of mentoring him to work better with others, his boss demoted him.
The boss was giving someone else a favor, making them the lead of this now-important project, some up-and-coming hotshot. He made up an excuse about "bad attitude", while just using it as cover for backstabbing him.
The OP probably had big $$$ in unvested options, so he had to play along and play nice, instead of quitting on the spot.