You don’t even have to realy train anything. There are more than enought ai checkers online. You would simply have to package one of them in a browser addon

The problem is that most people rate the first way. If a place has a rating of a 4.5 and I thought they were pretty good, but not perfect, so they deserve 4 stars, I am not going to rate them. Having 4 stars is usually considered not that good, so lowering their score is not what I want to accomplish as 4.5 is pretty fitting in the context most people have. That leads me to giving 5 stars relativley often and not rating ok or just good places at all.