Okay, I think I see the problem.
See, the US Government is made up of 3 coequal branches: the Legislative Branch, the Executive Branch, and the Judicial Branch. Now, despite what you might have heard, the President (from the Executive Branch) does not actually hold all the power. Congress (from the Legislative Branch) was in the process of removing Executive power from Trump on January 6 and the courts (from the Judicial Branch) were preventing Trump from stopping that process through legal means. These are crucial facts in understanding how Trump was never "in the driver's seat" and was, in fact, on his way out of his third of the driver's seat.
The January 6th insurrection was a part of Trump's plan to prevent Congress from performing their constitutional duty and overthrowing a legitimate democratic election. In other words, Trump was attempting to overthrow the powers and responsibilities of the other two branches of US Government.
Does that help?