RAID has an in-game review system for champions, which, as many things created by Plarium (with exception of the Art Team), is built badly and idiotically leading to often completely wrong ratings for Champions.
This then gives absolutely wrong information to beginners and casual players leading them to waste their earned resources and get angry & frustrated down the road.
The Bully example
The below picture is a perfect example of this. Bully is a useless champion that nobody uses. He is rated high in all categories / locations when the truth is that he is a completely trash champion and not good in any of these places.
So never trust the in-game reviews in RAID. Instead, think for yourself and research champions using more reliable champion lookup references such as the one of Ayumilove and HellHades (links at the bottom of this blog) or watch YouTube videos about them.
Public Relations (PR) impact on Ratings
Sometimes, due to a mistake in PR the ratings of a specific champion are completely fake and wrong. For example when the Ninja fiasco happened when Plarium did not prepare things properly and Ninja streamed completely stupid things about RAID, the RAID players were so upset at this, among other things as well, they just bombed the champion ratings.
How Ratings should be designed to be correct
The proper rating should be shown for champions according to SUCCESSFUL AND ACTIVE usage and BY THE 3 GAME STAGES (Early, Mid, Late) statistics which Plarium has. For example champions which are actively used in sub 1 minute dungeon runs should receive a very high rating for that dungeon and the rating for all champions should be scored AUTOMATICALLY up to 5 points according to their successful usage. Rating by the herd is completely subjective and wrong and should be removed or added in a second tab; as many players have no clue what they are doing but have a lot to speak about.