My biggest PS2 disappointment ever was God of War.
I really, really wanted to like it. Superb production values. It looks great. I love the settings - that ancient Greece thing. But dear me what a boring , repetitive game. The boss fights were OK but smacked of QTE fests. What killed it was arena style combat sections that were just SO boring. I felt no connection between what I was doing and what the character was doing. It was just mash, mash, mash - repeat.
I put it away and went back several weeks later and it was just as bad. Got rid.