As Ottoman empire I find:
Trick is to do the Kurdish decisions for PP until you get to 100% compliance. Your stability won't fall below 22-24% depending on democratic, until you retire attaturk, then it does go to zero or close. Ouch. However, you'll have all your advisors filled, refuge to German and Italian scientists, absorbed the debt and be working to removing it, perfect relations with all the people you want to build factories in Turkey AND 2000pp. Don't do any improve worker conditions or anything else for stability - waste of time.
Then you get to election day and... compliance falls by half, so hit that button again till it's 100%. Then you get local elections, and you core them immediately. Now you can start to build up stability with working conditions and peace promises. And you can get foreign capital every time it's possible. Sure, eventually - 1940- you'll run out of PP to do everything still, but by that point your industry will be purring, and you'll have no Kurdish issues, and I find my stability (pre-wars) in the 80s by 1939, which is enough.
PS: I LOVE the KOC Tikaret monopoly. +15% efficiency cap, on concentrated industry, is insane. I can build enough guns for my entire army with just 5 factories.