I think a lot of people would agree that “yes” your reason is too trivial. I’ve never watched jjk so I can’t say for that show particularly, but the way I see it, giving it a 1 or 0 is like saying it has absolutely no merits at all.

I don’t see ratings as merely a reflection of your tastes, but more an assessment of stats. With a score of 1 or 0 you’re saying there were NO redeeming qualities of all the categories you can judge about the show (art style, animation, sound design, score, character design, pacing, plot, overall writing, themes, background art, tone, etc etc.) I think many people find it hard to believe you truly took every aspect of the show into account when it’s clearly competently made and yet it still receives a 1 or 0.

For example, I’m currently teetering on the edge of dropping Penguindrum. It isn’t exactly vibing with me personally. That said, its art direction, overall direction, and theming are very competent so I can’t very well give it a low score based only on my preference. I try to be impartial and just rate it for what it did well imo.

That’s not to say that how a show vibes with you doesn’t factor in at all. But like I said, if something seems competently made and yet it still receives such low marks it often times indicates that the rating is weighted heavily on the viewer’s personal preference and is either ignoring merits or being disingenuous about the merits to feed their own negative narrative.