Its up to you whether you want to trust it or not.
The way I see it, its more like a guide or a tool to get a consensus from the critics out there. Whether you want to agree with the score or not is up to you.

Bold and ambitious, X-Men: Days Of Future Past is an admirably controlled thrill-ride tempered with perfectly shaded moments of arcing darkness.
Erin Free
FILMINK (Australia)
About to get 2 negative reviews from top critic Amy Nichols :/.
Yeah, it's odd.
Is there a Marvel movie she liked?
I can't find one in her list on rottentomatoes.
A common word I'm seeing used by many of the critics: "Ambitious". Has anyone else noticed this or is it just me?
That's fine then, all balanced out!
How can two reviews by the same person be added though? Seems a tad silly
It doesn't balance out.
For every single bad review it takes 15 positives to keep the score at 94%.
I've seen a few reviews say it's the best movie SINCE X2.
But how many claim DOFP is the best X-men movie of all time?
The first "fun" summer blockbuster and maybe the best X-Men movie yet.