Sorry to say but this is a dumbest question ever.
If you bother to use some of your brain cells, then you should have asked that why ECP went against only PTI? The one party which was facing onslaught from army establishment. Why you couldn't develop such common sense? ECP just not went against them, they went against them like a mission with full dedication. They pursued them from high courts to supreme court. If PTI acted 99.8% on ECP guidelines, then ECP went after that 0.2% and psychopath Qazi also pathetically as a lawyer of ECP focused on that 0.2% with microscope and cross every limit to actually kick out the largest party of the country out of elections on petty points. But if PPP & PMLN only acted 30% on ECP guidelines then ECP won' t even dare to touch them. It is biggest treachery by ECP or a CJP, if they go "selective" against a particular party using selective points But failing to realize that how many other fundamental rights they are going to trample & destroy by doing so.
In a normal society, ECP head & Qazi Issa would be facing Article 6. They have done severe treachery. They have intentionally insulted & destroyed the national mandate which should be the most sacred & important. Now these a-holes wants to further insult national mandate by giving reserve seats which should have been of PTI to others. This is called treachery. The nation clearly voted for PTI-backed candidates, they absolutely rejected PMLN / PPP but Qazi moron wants to give reserve seats of PTI candidates to rejected parties and make their minority as majority just because Qazi earlier had himself kicked out PTI out of elections.
PTI did intra elections not once but twice unlike any other party and on the times when ARMY was unleashed on them. Still they were punished because it was already decided. It was matter of 'excuses'. IF angels drop from the heaven and do everything absolutely with law and precision even then Qazi & ECP would find any excuses. They would say, why intra party elections held between 9:00 to 5:01. The elections should have closed by 4:59, Angels did a mistake here, so let's kick out the party. Its pity that you are unable to understand the amount of injustice done to the nation and national mandate by ECP / Qazi on army's behest.
You need to think on real issues, real human / citizen rights, the reason of democracy, why law & constitution is created at first place. Basic principle of law is that it should be equally applied to all. Selective criteria is utter dishonesty. When you start thinking on these lines, then you will realize why elections were postponed several times by army establishment until they got their man in the supreme court. The one tout who can kick out largest representation of Pakistanis from the elections and all that shamelessly.
