Well when someone rage quits a forum and deletes their account because their favourite character, who is the most notoriously memed character in the entire manga, gets unsurprisingly dunked on once again by the author but they only leave for about a week before they come back to whine about the same shit yet again then yeah, that person gets treated like a joke.
If they want to bitch about the chapter, they can just do it in the chapter discussion thread. The bitching does not need a new thread every week just for one individual's take on a chapter.