Were you cut out from rest of the world last two years? We all know there was a shortage everything mostly because we had a fudged forecasting system to support cartels that misreported levels to export to Afghanistan at higher rates. This misreporting of levels got apparent during the COVID planning and now gov is rectifying.I am challenging you, if you can't prove your statement than accept that either you are ignorant or or lying.
I got all the below in just 5min from google.
According to figures nothing was wrong, but reality we have been seeing.
Tarin says 3m MT of commodity needed to meet country’s requirement
Answer to your question on what happened in 2018. I wouldnt call it PMLN it sole fault as it was something that took years to happen by the cartels spread out in all political parties, they were controlling figures to give wrong estimate to governments and profit. But what enhances blame on PMLN is their compliancy that they directly profited from it, allowed it to happen and didnt take action. PTI has Tareen who would have profited and being investigated for it but PMLN has alot more people directly profited from it including the Sharif family. History also shows this fudging of numbers is taken more advantage of during PMLN tenures. Finding the error and making steps so it doesnt happen again is what makes the current gov more credible.
Inshallah next year things will improve, my only hope is opposition stop being anti Pakistan in their aim to create hardships for current government.