I agree with some of your point but don't find your rationale convincing.
>Nothing in the constitution talks about congress passing [stuff]
Yeah, because the constitution was intended to allow Congress to pass laws that define the rest of "the government". The constitution is not supposed to be the _only_ law.
>It hasn't always been like this. It wasn't envisaged.
The founders knew they couldn't predict the future which is why they set it up so Congress could make laws. Again, the whole thing is working as designed.
Now, you could say that these laws have had unintended consequences, or no longer serve their purpose, or need modification for current times, etc etc. Those would be policy positions, not the sign of some constitutional crisis.
And critically, it would be the role of Congress to correct, not the president. Now, yes, absolutely, voting for president is a way to enforce checks and balances on Congress when they are not responding effectively. However, completely eroding all checks and balances on _Executive_ power in the process, which seems to be happening now, doesn't look like a great move to me.