Exactly we've been hearing that for 40 years now at least and every election cycle dems move farther right right behind the republicans.

Just because the argument has been repeated many times that doesn't make it any less true. I do think that Democrats who take advantage of the fact that we have a 2 party system is a problem, but I think we fix that by advocating for ranked choice voting. Otherwise, a third party winning in a major election is a pipe dream. If they truly wanted to build a presence, they should be trying to win more minor elections to build themselves up rather than going for a hail mary for a Senate seat or as the president. Luckily, there are only few Democrats right now that I'd consider to be just Republicans painted blue. In the niche cases where that's true, then maybe consider voting third party