[facepalm]

She writes: " Even if Google was mostly good, I need to have the right to call them out when they do bad things."

Are you really nitpicking about "evil" vs "doing bad things"?

And everybody can say whatever they want, and criticize whoever they want. But companies are not obliged to keep people on the payroll who use their position to make the same company look bad. The whole assumption is absurd.

Board members forbidding whatever is not the issue at all. The job of the board members is to keep the business afloat and prevent harm from coming to it. Bosses give their employees instructions all the time.