How do I do decently in this game?

I've been trying for an eternity and always seem to hit a brick wall when Black Thursady hits. Perhaps my best achievement was managing to get Otto Braun as president on easy mode, but this was of no use when I got into what to me feels like the true end of the game, in the never ending election loop around 1932...

How can I do better? Give me some small tips or overall strategies. Thank you.