That's...not how things work.
Some/many may lie (haters gonna hate, etc), but user reviews on their own tend to be rubbish. Professional reviews have their fair share of flaws, but they are at least professional. Players just tend to write off gameplay because of their own mistakes (as evident in some threads here) and come up with insane definitions of subjective.
I haven't seen the player play, so how should I know if there's merit in what s/he says? Took ten hours? Maybe he skipped every cutscene and dialogue and lore books. Possibly some optional dungeons too. Maybe he didn't, who knows.
Besides, I don't value someone's opinion who can't remember the name of the char they played with for hours.