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Just in case, I'll be using the "academic" interpretation of ratings for anime and movies.
1-2: Fail (don't even think about watching it)
3-4: Pass (slightly better than just sitting and staring at a wall. Just slightly)
5-7: Good (depending on the grading scale, this is either just watchable or quite watchable, but some serious flaws prevent giving it an excellent rating)
8-9: Excellent (no major flaws, there are strong positive aspects)
10: Excellent+ (almost perfect, it's hard to imagine how it could be better)
Or is the issue something else?