Will the next Democrat President be able to undo the damage of Trump to the federal government?

Assuming we're allowed to vote in 2028 and assuming a Democrat President wins, how much of the damage are they going to be able to undo to the federal government?

First, would the people who have been fired even want to come back? We will have proved that working for the federal government is not a stable job anymore and they will have moved on.

Second, Trump will have replaced everyone he possibly can with loyalists who will try to obstruct the new President anyway they can making the only possible choice is to fire them. Then Republicans will turn around saying Democrats do the same thing.

The problem is going to be how quickly and easily the next Democrat President can implement some kind of project 2029 agenda and come in with their own game plan on how to fix whatever is left of this new government.

I can see a scenario where Republicans cede the 2028 election to Democrats because they don't want to be holding the bag in 2028 while the country is falling part, only to turn around and once again say Democrats can't fix anything and easily win in 2032.