xcares RR review system is horrible. The fact that you are quoting it means you have never participated in their site as an author. People do drive by .5 stars all day on royal road to new novels posted. It's much more toxic than webnovel. The only thing RR does is prune negative reviews for popular novels. https://www.royalroad.com/fictions/best-rated.
Somehow every novel on the best rated has above 4.75 when its on a 5 star scale when you can give .5 star reviews. That would be impossible in a fair reviewing system as you would need 19 5 stars to every one .5 star to get anywhere near those ratings.
At 9 5 stars to ever 1 .5 star we get 4.55 rating. Yeah their rating system is bullshit please stop quoting it. The mods review purge for popular novels.
Even at a fair distribution of: 6 5 stars, 2 4 stars, 1 3star, and 1 .5 star you get stuck with 4.15 rating. Their ratings are obviously inflated for their top novels.