While a large element of the GOP has gone in a direction that I cannot follow, I still support most of the core planks of the party. There are still many leaders in the party who believe in responsible center right government. Eric Holcomb and Todd Young from my home state are good examples of this. While the rise of Trump has made the crazy wing more powerful as of late, that is clearly completely unsustainable and while I'm not completely optimistic I do think the reasonable parts of the party will eventually rein in the party's excesses. Regardless, the Democratic Party seems to be on track to move further left, so I don't have many other options except to support the reasonable candidates in primaries and back folks like Holcomb and Young.
I admire your loyalty to your party and it’s values (er, it’s now seemingly former values).
I would posit a theory, however, that electing Democrats...however much you disagree with them...might actually serve as a wake up call to the GOP that they need to get it together and abandon the crazy wing of the party that has taken over.