They just became jaded posters and podcasters.
I think that’s only really true for people that were the most visible supporters of Bernie. Plenty of people who had door knocked or phone banked for Bernie turned towards more real world organizing.
Unless the DSA is actively preparing for the innevitable betrayal the exact same thing could happen again.
It’s not consensus within DSA but I believe a significant enough portion of the org wants DSA into a party that just runs on the Democratic ballot line until they’re forced out. The problem is DSA is so ideologically incoherent that different factions resist the kind of centralization necessary to make that happen.
The strategy Hasan is arguing for is to create a party like organization that runs on the Democratic Party line. The point is not to rely on Democratic Party infrastructure or to do entryism. I’m pretty confident Hasan doesn’t believe the Democratic Party can be reformed. Rather he’s just arguing that running in bourgeoisie elections is next to impossible in the US on a third party ballot line.
This is basically the strategy that I believe most of the DSA endorses. The problem is the DSA doesn’t have the necessary infrastructure or consensus to act like a real party and discipline their candidates. That’s not the same problem as the one you’re describing though.