> This doesn't create an unchecked executive -- the legislature can also check the executive by impeaching him if he violates the constitution.
The impeachment clause is for high crimes and misdemeanors and is supposed to be an extraordinary procedure that takes an immense amount of time. It's not realistic to rely on it to prevent a President from selectively enforcing or ignoring laws on a day-to-day basis, especially considering it has never been successfully used to remove any president from office even in the case where Trump used his office to extort a bribe.
Anyway here's what James Madison had to say about your proposal in Federalst 47:
"No political truth is certainly of greater intrinsic value, or is stamped with the authority of more enlightened patrons of liberty, than that on which the objection is founded. The accumulation of all powers, legislative, executive, and judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, self–appointed, or elective, may justly be pronounced the very definition of tyranny. Were the federal Constitution, therefore, really chargeable with the accumulation of power, which the argument supposes, it would be the very worst of all possible governments."
> the state really cranked up to exceed the constitutional constraints of the federal government... this stems from fraudulent portrayal of intrastate commerce... a great deal of the actions of DEA, ATF, FDA, EPA, etc cannot legally be funded
See, this is the problem with giving a single person the power to decide which laws to implement. You've made sweeping statements about "fraudulent" portrayals and the government exceeding constitutional authority, but these are just your own conclusory assertions. It's not clear that any constitutional constraints were actually violated, that portrayals of intrastate commerce were fraudulent, or that agencies like the DEA, FDA, etc. cannot legally be funded. These claims are unsupported, in fact they are anti-supported by decades of judicial review. Given your position, the President could just decide to shut down those agencies just on the flimsy basis you have provided. That's not how the system works.
I and others have realized that, despite your frequent appeals to the Constitution and the Framers, you do not appear to genuinely support the idea of a constitutional republic. Instead, you seem comfortable with a king-like authority, a single individual wielding absolute control over the government. That's a legitimate position, but you should be upfront about it rather than twisting the Constitution to fit your ideology. You're never going to squeeze a dictator-shaped peg into a constitution-sized hole -- doing so destroys the constitutional order.