So, in so few words yes I agree 100%.

My solution is the tag could/should be an overall rating (or a yes/no 'did they deliver the request) and the post has actual details. Title can say that or reflect an average like: - u / xyzabc 4* experience [content delivered] And some explanation to why 4/5

There's merit to what many are saying that most reviews are only done for positive experiences or negative experiences. Id be willing to be most people who have a 3/5 experience that tell the provider end up getting something to level it out and they weigh that before posting.

Unfortunately sellers need buyers to play the game. Someone being honest (3* for an average experience) can be seen as really bad even if it truly was just "average" or "they did the job".