Let’s assume 3/5 corresponds to a 50% rating and that this percentage represents the ratio of good, so 50% of the film (not necessarily duration) is good, the other 50% is bad. People generally want a film where the good parts outweigh the bad parts. For a film to be really enjoyable it needs to be way above 50%. Mathematically speaking this means current rating systems have an exponential behaviour. For practical purposes it would be better to have logarithmic rating systems as that would compress bad ratings to a few low numbers and give more nuance to good ratings.
Let’s assume 3/5 corresponds to a 50% rating and that this percentage represents the ratio of good, so 50% of the film (not necessarily duration) is good, the other 50% is bad. People generally want a film where the good parts outweigh the bad parts. For a film to be really enjoyable it needs to be way above 50%. Mathematically speaking this means current rating systems have an exponential behaviour. For practical purposes it would be better to have logarithmic rating systems as that would compress bad ratings to a few low numbers and give more nuance to good ratings.