It's like a reverse placebo effect. When something changes, people will start going over it with a fine-tooth comb. Some of the "flaws" that they might present

It's like a reverse placebo effect. When something changes, people will start going over it with a fine-tooth comb. Some of the "flaws" that they might present as problems with the new system may well have existed with the old system, but they were just overlooked / forgotten.