Pretty much this.
That said, I’d give the Rs the advantage at this point. They came within a relative handful of seats of flipping the house, and as noted, without OMB on the ticket and the POTUS’s party usually losing ground in their first mid-term, smart money is on them getting plenty of flips in 2022 to take the house. Good chance of expanding the senate, though probably only modestly considering the map. Too bad the 2022 class isn’t the 2024 class. Huge gains in the Senate would be likely if it were.
I think it will be great if it happens, and history seems to indicate that it's the way of things for either party in the same kind of midterm, but yeah, it will kind of be at the wrong time. A 2022 flip will only be good for grinding Harris's agenda to a halt.
There's a good chance the senate now will be at 50-50, which is essentially a dem majority. A lot of crappy, crappy stuff could be rammed through in the next two years with Ds in the white house and both houses, and there won't be any way to fix it without an R president and R houses. At best 2024 or 2026.
If we can keep at least a one vote majority in the senate, we can possibly kibosh maybe 20-50% of the commie stuff. Gun rights will be lost though. As I said elsewhere, there are too many R senators who will happily "cross the aisle" on any number of gun issues.