The data in the poll is correct, but people don't vote on policy. The problem is that OP is framing voters as hyper rational people who sit down to form a long list of their policy preferences, then examine each candidate and select the one that best aligns with themself.
Nobody, and I mean NOBODY, votes like that, and they never have. They look at the candidates and pick the one that's more entertaining/has better vibes, then justify their support by either changing or disregarding their personal policy preferences, or (more often) convincing themself that the candidate supports whatever they support, regardless of the candidate's stated positions.
Again, you're missing the point. I'm not debating the overall end goal. I'm talking about the strategy to achieve it.
Just saying "the Electoral College is bad, so let's get rid of it" is fine, but it's not a strategy to make it happen. That's a goal. What is the strategy to make it happen?
Likewise, just listing off a set of popular policies and saying "let's make a new party" isn't a strategy to actually achieving those goals. I'm not saying that voting for a 3rd party is bad because it "steals" votes from a major party. I'm saying it's bad because it's an effectual strategy to achieving the goal of enacting the policies in OP's post.
You're absolutely right that the 2 party system sucks and that the Democrats are awful. But, again, that's not a strategy to achieve your goals. Like it or not, but none of us will ever break the 2-party system by forming a new party or complaining about how bad it is.
If you compare, say, the Democratic Party of the 1920s to the Democratic Party of the 1960s, they're drastically different, almost diametrically opposed to each other on nearly every policy. Likewise if you compare the GOP of the 1950s to the GOP of the 1980s. Or the Democratic Party of the 1970s to the Democratic Party of the 200s. Or the GOP of the 2000s to the GOP today. How did those changes happen?
In every single instance it happened not by a new 3rd party forming or outside agitators pushing the parties. It happened because a fringe element of the party enacted an organized push in the primaries to co-opt the party, won a convincing general election victory, then strongarmed the rest of the party into ideological compliance. That's how parties change in the US, not by being supplanted by a new party. You want a real, left-wing progressive party? Get behind a massive push to primary key Democratic leadership (I call them the Vichy caucus), win a general election, then strongarm the party into compliance.