Because that’s how the spoiler effect works.The more support a leftist third party gets, the easier it is for the Republicans to win.
I can’t tell you how to fix it, but I can tell you that an election with 10% Socialists, 40% Dems, and 50% Reps will scare people away from voting Socialists.
At least as long as MAGA is a thing and the Dems aren’t seen as totally corrupt and basically the same as the Reps by the general public. And believe me: they aren’t.
Huh, I found it to be so much easier to set up than nginx that I wrote the devs a little thank you message