That is because Hasan and Wahab have not been hailed as the best bowling talent of this generation and the next Wasim Akram. When you hype someone to the moon and beyond, don't complain when the level of expectations are high, because that is inevitable. Not talking about you, I'm making a general comment.
Amir fans spent years telling everyone how he is better than anyone of his age and will be an ATG, and also got foam in their mouths if someone said that Starc, Boult or Mustafiz are better than him. But then, they cry when he is judged differently. They can't have it both ways. If you are going to put someone on a pedestal, don't expect him to be viewed and judged with the same lens as everyone else.