The harem genre used to be entertaining yet impactful. Even though it was mostly leaning towards fan service and romance, titles like The Quintessential Quintuplets really changed the game. However, instead of giving fans the same standard of stories and characters, the harem genre went downhill with its highly exploitative representation of female protagonists and plots. Besides TQQ, only a handful of harem anime have given above-average performances, which include Masamune-Kun Reverenge R, In Another World With My Smartphone, and The Café Terrace and its Goddesses.
Source：https://www.cbr.com/tenpuru-ruining-harem-genre/
