Thank you, Mangadex, for adding the 'Distribution of Ratings' tab.
It makes it really clear to me that this manga isn't as bad as the overall rating would make you think initially, but instead, it's just getting review-bombed by either some people who think that only the '10' or '1' ratings exist or by some people who are really butthurt about some random shit that happened in there.
There really is no other real explanation as to why there would be so many '1' ratings. Anything above it is fine - '2's, '3's, whichever. It's believable that many people would find this really bad in their opinions, hence the amount of '4's, for example. A '4' is a reasonable rating for a manga you really thought was not for your taste, and that's fine.
But, once again, a '1' rating would really almost only be fitting to give to either an upload that's straight up trolling or a manga that would literally become a legend in the otaku community for how bad it really is, despite getting published.
TL;DR: Don't rate mangas '1' unless it's some really extreme case of bad or a troll-upload - that's fucking dumb.
And you're probably dumb, you big poopyhead.