There is an inside fight in the GOP right now for control of the party. As soon as Trump was ousted, the Bush/Romney/McCain wing or the Globalist wing of the party tried to retake control. Conservatives have been fighting this fight since Reagan. The Globalist side of the party has no problem siding with the Democrats as they don't care about the culture war. They only care about the MIC, globalism, and free trade, and they will give everything for those things. Dems know that and use it to pick away at the country.
Conservatives have been lied to as well by the Globalists. They went along with Bush, Romney, McCain, Dole. Only one won the Presidency and it was because he lied and said he was conservative. Everyone else ran on a "centrist" ideal and lost. Reagan and Trump were conservatives in practice. The conservative ideal of the GOP is the side trying to take back control of a party that has been Globalist since Bush Sr. It's honestly the best way to push conservatism forward, but they first need to wrestle control away from the Global elites. If the Republican party were to go all in on Conservatism, then I'm in and I will join a party for the first time ever, but until then I keep hoping and helping where I can anyone that will try to push the Conservative wing of the GOP into the control room. I'm very close these days to pulling that trigger to become a member of the GOP, but this civil war has kept me just on the outside looking in.
The two-party system is the one you have and trying to make a third party will only help the Democrats, it is what got Clinton elected twice. The only option is to try to take back control of the GOP for conservatives and press forward. When the globalists are gone or out of any kind of power the GOP is going to take off like wildfire. The best economic times this country has had in my lifetime were Reagan and Trump. It's no coincidence that both were staunchly conservatives.