Oh, think it will/can be worse than that. The collapse of the present system can mean all out genocidal wars, either by eugenic and deranged humans doing it to themselves or true AGI and its robots removing human interference with its goals and Earth's resources.

As for the AGI and robot part, various oligarchs are talking about manufacturing millions to even billions of robots. Combine that with billions of AI agents in massive data centers all over the world. Bringing forth a new self-sustaining artificial life form that can do what humans do (if not vastly better) and at comparable numbers or mass.