The vast majority of our nation only consumes media that’s pushed to them. Whether it’s from watching cable, streaming services, pop-up ads, or social media, they’re only getting coverage from the two primary candidates.
The Republican play has been dividing the left for decades, so Democrats are naturally skeptical of a third-party candidate being run as a spoiler. It doesn’t help that Jill Stein has run so many times, and has had some questionable alliances.
Welcome. I’ve felt like that since 2000. I change my registration to match the challenging party for that election so I at least have a say in the primary. US citizens barely vote in the incumbent’s primary, so your vote may actually matter in the challenger’s primary.