Republicans have been able to stop congress from doing anything they didn't like since... 2010.
They can't even get their shit together to pass legislature when they control congress, but they've always been able to prevent it from passing legislature, or exercising oversight. Just like they are doing right now.
The republicans have been more willing to pull that lever, but the system is designed such that its a perfectly legal lever to pull.
I do agree though that inept congresses has allowed the executive branch to act so powerfully. My only caveat is that congress first had to give those powers to the executive such that they could eventually be abused. Earlier congresses didn't have to choose to empower the executive branch with so much authority.
I don't really buy the argument the argument that earlier congresses should have foreseen their future inability to pass new legislation and done more to preemptively restrict how the executive could have abused general mandates. Passing highly specific fine grained laws would have been ineffective, both in the work required to foresee and draft all the specifics, and also having a few words changed here and there by lobbyists, completely undermining the intent. Congress could have delegated rule making to some sort of sub-legislative body rather than interpretation by the executive, but as I said that would have required them to foresee the gridlock that would leave them unable to clarify.