You try, but it ends badly repeatedly, sometimes unobtrusively, sometimes suddenly and catastrophically and in public, until the memories of those times plus fears of everyone's second-guessed reactions put you off doing anything; you go so long without succeeding at planning and discipline that even trying seems alien and scary; add the two together and you're well into "learned helplessness" territory.
As you say, sampling the space of behaviours and getting apparently random, mostly negative results back and wondering why your mental map of cause/effect and effort/outcome makes no sense whatsoever.
So... what does one do, when in broken-EF state for so long?