Anyone who thinks that Trump alone can fix the government is deluding themselves. The Constitution will stop him in many cases and the GOP/Rats will stop him at many other efforts.
How can Trump do much more then you imagine. First he runs the executive branch and appoints all its heads who also control the staffing of all the alphabet agencies.
So lets take just one example: The new and improved SEC uses it power to break up one or more of mega corporations, cutting off the Lobbyist’s money supplies.
He can wipe out all of obunghole's executive orders with the swipe of the pen. There is much he could do, and if the GOP Congress were to stop him (on issues like getting rid of O-care, etc.), then all they would be doing is exposing themselves for the leftist scum they really are. Your argument is not making any sense. Of course he'll be guided by the Constitution, but that won't hinder his efforts to end much of the obunghole BS.