If the Trump era showed anything, it’s that the party does just fine with the RINOs, but that the GOP doesn’t really do anything much for its voters.
Back in the 90’s, I lived in David Dreier’s district in Los Angeles. Every two hears, he would show up in the district to campaign, and year after year the biggest issue that got raised was “immigration”. He would nod his head, and then go back to Washington and stab his voters in the back. I remember one year talking to him and asking him about this, and his answer was always that speaking to the businesses in his district, they all told him that they couldn’t survive without “immigration” (illegal, of course).
We have been played for suckers for years by the uniparty establishment.
That said, the Republican party is the only vehicle that can even conceivably be used at this point to advance a right/populist agenda, but the establishment types are going to have to be driven out in the primaries. It’s a longshot, and some of those candidates are going to be a little rough around the edges, but is there any other way?