In 2013, the majority did not have faith in PTI because of their inexperience.
However, after ruling KP for 5 years,
people believe that they have gained enough experience to rule the country and would have learned from the mistakes that they made during their first shot at governance.
Furthermore, PML-N were greatly damaged by the Panama Leaks and the verdict of the Supreme Court to disqualify Nawaz and send him and his daughter to jail.
Imran Khan compromising on his ideology by giving tickets to electables also played a significant role in PTI’s landslide victory.