The insurrection act is peanuts compared to what trump can do under Executive Directive 51, which basically gives him power to restructure local and state governments at will and override the legislative judicial branches wholesale.
The powers they gave themselves during the cold war to ensure "continuity of government" are ghastly, and the conditions which they can be invoked have already been met simply because the other branches of government aren't functioning.
https://fas.org/irp/offdocs/nspd/nspd-51.htm