People complaining about others criticizing the manga. Laughable. This is a comment section, where people comment, about what they think of the manga.
"The manga has an outdated art style, the plot doesn't flow naturally and hard to follow", if this is what people think, they will speak their mind. What sort of imbecile disagree to let people voice their opinion unless they can achieve the same thing? What makes "if you can't do it, don't criticize it" any different from "if you can't do it, don't praise it"?
The translation is, in the end, done by the translator. There shouldn't be any reason one has to stop what they want to do simply because someone else doesn't appreciate it. Likewise, there's no reason people can't voice their criticism if it's directed at the manga itself and not baselessly thrown at the translation.
https://mangadex.org/title/23883/ and sometimes people criticize the translation, for good reason.