That is a broad statement. If you are referring to the Primary Elections you have a point.
In the General, you support the Republican or you support the Democrat by not supporting the Republican. There are no third choices.
Civics 101 and the electoral system the Founders created proves that we have as many choices as that system allows for.
That you limit your vote to two evils is all our problem. You can say we have two choices. That is a false statement on it’s face. We have more. You CHOOSE to not vote for them. So you don’t get to complain when your liberal Republicans do what they are doing.
Oh you ‘can’. Good luck with that.