The graph implies that films are under/overrated according to audiance perception instead of critics. To me, underrated means something with critical acclaim but little public appreciation. Conversely, saying something is overrated means it has widespread public appeal but little artistic value

Other people have commented on this but it looks like the ideas of "underrated" and "overrated" have flip flopped.

So the graph values audiance scores over critical scores? WHAT?!!?!