I hear you. I voted for Nader in 2000, then spent years protesting the Bush administration. If Democrats consistently win for long enough, primaries can force them further left to capture more of the vote. I’d love to see us break the two-party system, but they always fail to get a single Electoral College vote, and mostly help elect Republicans. Why do you think RFK Jr. is funded by conservative PACs and Jill Stein is supported by Putin?

https://www.americanbar.org/groups/senior_lawyers/resources/experience/2024-january-february/are-thirdparty-candidates-always-spoilers/