Adaptation bias

When a person has biased feelings (often negative) of a adaption since they have seen the source material first and notice that the change is much clearer to them. Often times one feels this way after giving said adaptation a chance.

Person 1: With the Watchmen movie, I didn't really like it; there were many changes that weren't needed."

Person 2: Looks like you have adaptation bias, don't worry; I'm the same way with the Percy Jackson movies