I never told anyone to get third party candidates elected. Whoever told you that was either maliciously giving you bad advice or is clueless as to how the American electoral political system works.
I think trying to both primary Vichy Democrats and run a 3rd party bid at the same time would be enormously counter-productive.
I don't think systems are immutable. That's exactly my point. They are, but you have to have a strategy that can actually accomplish it. Systems aren't changed by people just dreaming of a better one. They're changed by motivated people executing a successful strategy.
That's just my point. It wasn't a party like OP here is calling for. It was a movement within the Republican Party.
What OP is calling for here is kinda the exact opposite. The Tea Party movement successfully got a bunch of people who typically don't engage in politics to join and vote for Republicans. The never had a problem of ballot access or competing with an ideologically similar opponent in general elections because they weren't a different party. OP here is calling for people to vote for a new third party. That's a completely different thing.
What 3rd party did they create? The last significant (and I use that word very loosely here) new US 3rd party was the Green Party formed in the 90s.
It's not about whether it's the right time or not. The fact is that under the current political system it's simply not possible. The system is designed to prevent it from happening. You can't get rid of the Democratic Party until we get rid of the current political system first.
Also, if we're wishing for things that won't happen without overthrowing the political order, I'm much more interested in getting rid of the Republican Party. You know, the fascists who are actively black bagging people on the streets and sending them to a foreign Slavadoran labor camp where we supposedly can't get them back from.