To be fair, the dems have given a go at a similar tactic, since their last 3 presidential campaigns had the implicit slogan of "At least we aren't those guys".
the 2-party system devolves into some kinda halfway dumb Hegelian dynamic where you are always opposed to what the other guy is doing while simultaneously being dependent on them for your existence.
France maybe doesn't fully count but when turnout is very high they are almost FPTP. Also the second round when it happens is usually three way and sometimes even four way. And their party system is about as hectic as it gets (i.e. most PR countries in Europe are much more stable)...
This will sound very mean, but when you open up your voterbase to more people, you open up democracy to be swayed more by pathos rather than ethos/logos. An educated, informed voterbase can make smart decisions and have a 3rd party rise up and defy the philosophy of the splinter vote.
Now, the US is 300m+ people with a voter base of about 170m. the searches for "is Biden running for president" on elecion day spiked more than the day he stepped down. Sentiment at this size adjusts too slowly to have a 3rd party rise at the national level, and if one gains momentum, the panic of a lost election will scamble all that progress.
If we want 3rd parties, we need to vote to enact voting that ancourages it, like ranked choice voting.
Certainly for congressional elections, at least. Presidential elections might be more feasible if still highly far fetched. Of course at this point any 3rd party candidate is more likely to split the left-wing and moderate electorate than the radical/MAGA voters who usually don't really carry about specific policies or stances on most economic or other important issues.
The right leaning media machine is not beholden to facts or accuracy, it’s beholden to narrative.
The center and left are still stuck in the old era of trying to do reporting, and so they look like confused and untrustworthy in comparison.
Study how the right does media and messaging, its half of the flywheel that powers the current political era.