For the most part I agree with you (first time) we all say Turkey's foreign policy is and was disaster under the short man with glasses it was literally a joke.
Although Turkey can not anymore come to a resolution with Syria. It is to late also you forget Syria (Assad gov) and Iraq to some degree have been the biggest supporters of PKK. Iraqis have given up on there northern borders a long time ago. The PKK is not there problem and they would probably let the Kurdish independence go forward, they don't have much choice.
I think our best option right now would be to arm or support pro Turkey groups in Syria and Iraq just outside of our border 10/30km nothing unrealistic like taking over Damascus or Baghdad, basically create a buffer zone or pockets of influence. At least this would limit any Kurdish / PKK plans in the region for a "greater" Kurdistan. And give Turkey a stronger say on the table. By pro Turkey I mean Turkmens and Arabs who lean towards Turkey. Not salafists who change sides depending on who's got a deeper pocket.
If Ankara does show some military posturing Syria and Iraq can be silenced, however there are too many major players, US, Russia, Iran etc no doubt Iran gained the most out of this conflict mainly through non state actors, which Turkey failed to do. Let's see what happens next in Syria, if Turkey does any more ops etc
@TheCamelGuy btw do you see a military conflict between KRG and Iraq in the future?