There are dozen of nations around the world with more than 3 parties. The reason no third party can win in USA is because of people like you spreading propaganda and idiocy that no third party can win.
Yea but those other countries are different, for the vast majority of SUCCESSFUL multi-party systems they are proprtionaly represented, this can be done in multiple ways, like having districts with multiple representatives unlike in the US where each district gets 1. Generally, to make those successful, though, there needs to be a pooling of the votes and an actual representation instead of the winner take all system America has. If you want to learn more about the natural gravitation that first past the post voting has towards 2 party’s watch the video above or look up Duverger’s Law, the law in political science explaining how this system gravitated towards 2 parties over time. You can also just do research on first past the post voting and see how this is just one of its downsides.
Also, you asked a question, I (and some others) answered the question, and you are lashing out in a really just rude way. You apparently didn’t know about this affect, which is fine, but you are unable to actually listen, internalize, and consider out answers without just responding that we are just spreading propaganda without any evidence as to why your belief might be right. I want third parties to win, I am just also aware that our current political system simply favors a Two Party System.