[neatoman]

If you have unrealistic expectations for something that is still good, you might be a little disappointed but you can still think it's good. If you had unrealistic expectations and it turned out bad, you'd probably still think it was bad if your expectations had been realistic. "Good for what it is" still doesn't work as an actual defense because everything ought to be held to a basic standard regardless of "what it is".

If we bring up a TMNT example, The Next Mutation was a live-action Saban show made without lifting the expensive scenes from other shows, that means it was about as good as one might expect. I don't think anyone would try to defend TNM on the basis that Saban couldn't just splice together footage from Shadow Warriors and Sekai Ninja Sen Jiraiya with reshoots featuring the Ninja Turtles.