The presidency is not a monarchy! The president might be commander-in-chief but it can’t just order random people killed just because he is “in charge” of the military. There are laws and layers of control saying who can do what. These laws are on the books and are being completely ignored!

Most of this power is vested in congress whom is abdicating their power.

In a sense, I agree.

The president should not be able to declare war without an act of Congress. The constitution grants the power to make law to congress, but then congress has enacted many laws which create agencies under the executive branch, which in turns empowers the executive branch.

So I agree that Congress should make/repeal laws that reduce the size of the executive branch so that only necessary powers are entrusted to the executive branch.

However, until that day comes, the separation of powers is the Legislative, Judicial, and Executive. Within the executive, inward looking (not external like killing people), yeah, the president and his appointed cabinet should have control. Without that control, you are defining an unaccountable form of government.