In your head, changing the system simply means replacing the system! Sorry that’s entirely your fault!
Maybe the OP can spell it out word by word what he means because frankly speaking your PPP-esque logic of ‘we have had military rules so somehow it makes it tolerable and acceptable for politicians to waste another decade and another generation through corruption and bad governance’ makes no sense.
Believe it or not, system can be changed from within without being replaced! Maybe think about this with open mind and more thorough understanding of democracy instead of churning the great PPP logic.