Speaking as someone who is a senior manager/director, my experience is dismissals of high-profile employees usually have a ton of complexity under the hood, and

Speaking as someone who is a senior manager/director, my experience is dismissals of high-profile employees usually have a ton of complexity under the hood, and whatever information is publicly available is often the tip of the iceberg. Out of respect for the folks involved, the full details of the lead-up to the dismissal are almost never released even internally in the company. This information asymmetry makes it relatively easy for a sufficiently vocal dismissed party to control the public narrative even if their internal behavior at the company was extraordinarily problematic. These dismissal decisions are not made lightly and I would wager there was a long history of events leading up to this. You usually only see the straw that broke the camel's back.