Its the same as how the vast majority of the US citizens hate both main political parties, but the majority also says "I wont vote for a third party because they could never win."
Yeah but it's true. It's better to ensure Republicans don't win than try to get your third party in. The problem is not the mindset of the people, it's the first past the post voting system. If they used ranked choice voting instead, it wouldn't be a problem.
This isn't a fair comparison because there's nothing stopping you from being on Lemmy, and the same evening watching some YouTube.
Most US voting systems are first-the-post which results in the spoiler effect. They would be wasting their vote if they don't vote one of the big two. (Other than areas which allow for proportional representation).
Don't vote for a third-party present, or governor or whatever. Y'all need some preferential voting to make that work.