Please give a definition of : " ... succeed"
... as well of what you think might a "Free German Socialist Republic" would/should look like to be a "success" ?
I you think of the communists take control of the "Rätekongress" and the Rätekongress rejects calling the national assamby for creating a constitution, rather making himself the constitutional body, then ...
your "Free German Socialist Republic"will become the remnants of a slaughter house, the Reich most likely broken apart with a french controlled Rhenish state, an indepandant Bavaria, a rump prussian state maybe around Königsberg and the inbetween ... something like the last decade of the 30 years war.
And the smell of millions decaying corpses all over germany, after a civil war the alraedy mentioned 30 years war era mighjt look like an afternoon tea-party.