So perception matters a lot. A strong civilian leader helped create a perception that the civvies were actually in control.
Given Pakistan's power dynamics, both PMLN and PPP governments were considered to not have much influence in certain critical spheres because of their acrimonious relationship with the military. In that sense, the fact that the PTI is presumed to have an excellent working relationship with the military actually projects the impression that they are in far more control than the PMLN and PPP governments. So your argument that the Chinese would prefer to work with a civilian government that appears to be in control would support a stronger relationship with the PTI government than the PMLN or PPP.
IK, otoh, is not stable. He started off as a moderate politician, so he actually had supporters even in India. But then he quickly became Islamicised and is now largely considered a mullah. His perception outside Pakistan is at rock bottom. He is now largely seen as a PA puppet.
The only people that consider IK a Mullah are the marginal extreme left liberal brigade in Pakistan and their followers in the West. Imran Khan's positions on various issues, and his actions so far in government, cast him as being far less of a Mullah than even the PPP and PMLN. His strong relationship with the military is in fact an advantage in terms of the PTI having the flexibility to bring about reforms and implement policies that might be unpopular.
With respect to the 'PA puppet' part, there remains absolutely no evidence of that. Imran Khan has always been extremely stubborn and independent, if he's getting along with the PA it's because they share (for now) the same goals of improving governance, economy and acting against corruption.
Here's why you face problems:
https://www.thestar.com/opinion/con...-is-being-held-back-by-its-mullah-ocracy.html
Sharif had broken out of this mould, but PA decided to put him away for good instead. And now we have Imran-Mullah-Khan running Pakistan.
Sharif never broke out of this mould. Before the final operations in FATA against the TTP, the PMLN was begging the TTP to spare Punjab. They capitulated to the TLYRA fanatics. They had no spine to take on the Mullah's then or now. The PTI in contrast openly denounced the TLYRA for inciting hatred and mutiny after the Asia Bibi verdict and arrested the TLP leadership. Imran Khan, even though he had to back down under public pressure, tried to bring on board leading Ahmadi minds into his government.
IK may wear his religion on his sleeve, but he is far from a Mullah. He actually has the correct recipe for today's Pakistan - wear Islam proudly and use moderate Islamic teachings to push for reform, reform that moderate Islam supports, and reform pushed in this manner has a much higher chance of social acceptance and popular support within Pakistan.
The Dawn leaks significantly strengthened Sharif. It wasn't an accident, it was a deliberate leak from the Sharif govt.
It was an extremely stupid move. Underhanded moves to malign the most powerful and popular institution in Pakistan, an institution that the PMLN already had a history of poor relations with, was always going to backfire in the long run. The only way for a civilian government to get stronger and more influential than the military is for them to deliver on governance. That is how the Turks did it and that is how Pakistan will have to do it. Leaks, gossip and underhanded tactics to malign the military are not going to work.
Sharif lost power by the end of 2016. The govt itself had become toothless by then, without the ability to deal with the rising deficit.
Zardari and Sharif's economic policies over the previous several years are what brought about the rising deficit - it didn't occur out of the blue at the end of Sharif's term. The PTI came in when the PPP and PMLN had already brought things to a point that they were spiraling out of control
What happened here is neither Sharif's nor IK's fault. Who else do you think is running Pakistan? Why do you think Sharif is being made the scapegoat?
With respect to the economic situation today, it is absolutely Zardari and Sharif's fault - what they and their political parties did in terms of economic mismanagement over ten years of running the country is the reason Pakistan is where it is today.
It was a kangaroo court, using made up theories and not actual proof to deliver the verdict. In a real court, the case would have been quashed by a real judge on the very first day.
Do you even know how he was "proven" to be corrupt?
How was it a Kangaroo court? The current judicial process was the result of negotiations and legislation passed by the PPP and PMLN back when Musharraf was getting kicked out. The judges are not appointed by the military, but appointed and promoted under a system the PPP & PMLN led political system brought about. Just because you disagree with the verdict does not make it a 'kangaroo court'.