HIs major mistake was marrying Melisandre.
A few years ago when the Imran Bandwagon and container(2014ish) - I had a coffee discussion with a known business personality(whom you can also see running out of the PC Peshawar lobby in CCTV video when the bomb exploded there - odd connection I have to that story as well).
So while my views on IK then could potentially still be searched via time machine, there was the surge of middle class with him so I mentioned this to him and his rather brash way said something to the effect that he is a good man but lost to the "chalice" and then implied he would easily be honey trapped by anyone.
Miscalculations happen, but when you are susceptible to the oldest weapon in human history then you cannot be expected to make any principled decisions.
Now, is the current FM susceptible or not, SS or not etc. I have no way to say or not say otherwise. Considering the track records of Yahya, Niazi and others in uniform it is rather likely than not.
The biggest issue here is people believing in infallible messiahs, and relying on the allure of single personalities who in turn are gullible enough to rely on the wrong people because they start believing their sycophants. In that way IK is no different to the FM - both were/are under the impression that they will last forever and have paid(could pay) the price for it.