The good news is many of the structural advantages that have been gained (census improvements, redistricting, the modest government downsizing and scam "spending" cuts, etc.) will bear fruit down the line. And after a couple years of socialist circus antics in Congress, a more sober Republican party may be in a good position to reap gains in 2030. But expect gridlock and worse in the immediate two years. Actually gridlock is the best I have been able to hope for, for most of the last couple decades, so I'm sorta sanguine about it.
“This should have been an opportunity for historic gains by the R party despite it being a midterm”
But it wasn’t. Go from there. Ask yourself why
I dream too. And pray.