@Priya, even if you file a case or tweet to PMO or education minister. nothing will change atleast for GATE17.
We are no one to tell them how to make a paper. for example: You cann't say birthday attack problem was out of syllabus, it has never been asked till 2016, but In syllabus Network Security is written. No one knows to which depth.
@Priya That is correct. Why this difference? From last year too we can conclude that the questions are not taken from an equal pool. For example last year apti set 1 was tough. Why this is happening - may be we can guess. Anyway it is practically impossible to ensure same difficulty unless standard of paper goes down.
So, normalization does a good job here. If one person is having high anxiety- a tough paper harms him/her whereas for a tough person it is good. But anxiety can harm even when exam is a single paper. Ideally there should be a single session- but normalization is not so bad. If you want to give some "valid" points against normalization, you can see here