Chevron deference wasn't created by Congress, it was created by SCOTUS to begin with. It was an interpretive rule that essentially said the courts should favor the interpretation of the executive branch over that of members of the public wanting to challenge it. Under both the previous and current rule, if Congress doesn't like the resulting interpretation they can pass a new bill.
The main difference is that now unelected judges decide how to interpret the law instead of unelected administrative officials. But that's what judges do.
What this is really about is that nobody wants to get blamed for what happens. So Congress passes purposely ambiguous laws and then deflects blame onto the courts for interpreting them one way or the other. The courts didn't like that so they said they'd defer to administrative agencies. It turns out the administrative agencies did like that, because they have almost no direct accountability and the only elected ticket in the executive branch has a term limit and frequently switches parties, so it was easy for them to participate in the revolving door and line their pockets.
Now the courts are going to go back to doing their job, so naturally now they get the blame for Congress passing ambiguous laws again, and the people profiting from the status quo are railing against it as if the courts are doing something wrong instead of doing what they ought to have been doing the whole time.