@miramira
While that might be true people have other issues with this manga, the rating on Mangadex dropped from a 7.79 roughly to a 6.37 since I last read it 1-2 months ago. (Give or take.) That's too fast. This manga only started getting translating 3 months ago. (That's November 2019 for you guys in the future btw). Mangadex ratings decline VERY slowly over months as people change their votes and make new ones.
In the case of this manga, there is an unusual amount of 1, 2 and 3 Ratings ( 27, 12 and 7) tanking the score within the 1-2 month I was gone, indicating a lot of Knee Jerk votes over something recent. Like new chapters. Especially odd since the 1 Ratings have essentially doubled. So I opened the new chapters and Uh oh, it's the Shimbaran Amakusa T symbol that can be mistaken as an Expy of the Christian Cross. People tend to Give Low Ratings when they think their religion is insulted.
So I put two and two together, I think it's a good guess of cause and effect for such a massive ratings drop, especially since ratings only tend to change when new chapters come out but it's still a guess.