My main point still stands: he wants to hit the ground running and get things done. The democrats have zero interest in doing anything that would help him right the ship and as such will do everything in their power to block him asserting control over the federal government.

They're the opposition party. They disagree with him about what is necessary to "right the ship," and of course they will exercise what powers they have to oppose him pursuing policies that they disagree with. Which is what every opposition party does, by definition.

As we've discussed, the federal government is unlike any private business. The President doesn't have unilateral control over the federal government. He has the entirety of the Executive Power - but Congress sets the policies and writes the laws and establishes the structure and allocates the budget and reviews the appointments of all of the officers of all of those agencies. The President is not the only one in charge of the government.

This is incredibly frustrating to people who conceive of the President as if he were the head of a company, because that's not how private companies are set up. But the intent - the entire purpose - of this framework is to allow Congress to serve as a check and restraint on the President's power. The fact that Congresscritters are using that check will undoubtedly irritate the President and his supporters, but that's the way the government is set up. But they also won their elections, and so they get to exercise the power of their offices.