3rd party in the US is almost certain to amount to nothkng given how game theory, the spoiler effect, defensive voting, the electoral college, and various other social and mathematical things come together

here’s a great series by CGP grey on why that is:
https://youtu.be/s7tWHJfhiyo

the reality is that a vote for 3rd party is the same outcome as not voting… its awful, but sadly that’s the way it is. if you want to vote 3rd party, you need to work to change the system somehow first