Why though?
I he felt he was not ready for the position, he should have applied for a lower one. Though the lower you go, the more you are expected to perform and if you don't, face the consequences....
It takes time for a leader to get to know a new organization when the join it. They are not privy to that level of insider information before getting inside. Whether a CEO is ready for a position is a question of skills, not a question of knowledge. During the first few months, the focus is on gaining knowledge, not skills. So yes. Give the guy a break. This could in no way have been expected to be high on his priority list if the threat was already dealt with.
Take a single issue we, as outside observers, know Uber is wrestling with... saaaaay ongoing litigation about self-driving cars, or internal sexual harassment and cultural issues, or national legal campaigns that threaten their business... two months is veeery little time to get a good handle on them.
And that's not even considering the time a CEO needs just to take a single meeting with relevant internal stakeholders and leaders, and get their outlook settings dialed in.