As Chris Stuckmann rightfully points out in his
SPOILER review, this is a very good film finishing what turned out to be a superb trilogy.
https://www.youtube.com/watch?v=2iyQ6rMpzfM
Yes, it's certainly not perfect but what it delivered is done so remarkably well when you factor in the other X-Men films. As Stuckmann basically states, it's sad that some people weren't smart enough to follow along for three whole films.
Some critics that didn't like this film clearly needed everything spelled out for them yet have little patience when things aren't exploding constantly on screen. They lack an ability or willingness to suppress restlessness or annoyance when confronted with something that hearkens back to another film. That's the viewer's flaw or fault and not actually the film's problem.
So, that is clearly the way I look at this particular RT score.