I could not argue a strong counterpoint on subjectivity. Relative subjectivity gets all the creative arts awards shows (e.g. Oscars, Grammys, etc.) in trouble on a yearly basis.
That said, fundamental questions remain. What are an individual's quality standards (in relation to films)? What does an individual expect of directing, acting, sound and visual editing, etc.? Do certain individuals even care? What is the definition of entertainment to that individual? Many more...
Film example:
Man of Steel. My apologies
@cml750 but I think this is a worthy discussion point.
One individual could state
MoS is a good movie reflecting the character's current comics persona. Another individual could state
MoS is the worse film ever made.
How did two different individuals watching the same movie end up with vastly different opinions? What did the film do or not do towards entertaining or not entertaining either viewer?
Personally, I think consensus opinion for any movie is unattainable unless it is one of those rare few that 'everyone' across the board loves. Personal tastes are so varied. Even so, I always wonder if any particular person's tastes are derived consciously or subconsciously. In my opinion, extreme takes often (not always but often) originate subconsciously and the components of a film are not analyzed beyond
'This movie is legendary!' or
'This movie is crud.'
Just my 2 cents.