> The country ran just fine before 1984.

Yes, and Chevron decided "let's keep it that way". It established SCOTUS precedent for what was already the status quo.

Are you aware of how polluted cities and towns were in the 70s? Why the EPA came into existence? Why Chevron became codified into law?

The 1984 decision only codified the status quo: federal agencies were already doing what it affirmed as lawful. The EPA didn't start functioning properly in 1984.

If the EPA currently relies on its private interpretation of ambiguous passages of federal law, that's messed up and needs fixing. Have them write a draft bill to codify how they currently interpret vague law, and let a senator introduce the bill on the floor.