I think you can pick a critic that you historically like and follow their reviews.
However i think the average score of critics says something, even though i have favorite games with lower scores and games i hate from higher scores..when looking at the average vs turn out of games i play, it appears that critic scores do matter, most likely the highest ones are games i have bigger chance of liking than games with low scores, not all the time, again sometimes you may dislike some genres, like for example i think the cinematic AAA games or family platformers tend to score very high but i personally dont find them as good, which is fine, but a lot of games around 88-94 critic score are games i really love, and a lot of games on the lower scale are indeed mediocre games.
So what i would say is you can somehow build an estimation based on that.
With that said though, i will point out that some games are not to be trusted at all when it comes to critic scores, and those are games with agenda behind them or controversy, if its either of that then expect the score to either be inflated or deflated.
Like right now with Atomic Heart near release, i tend to approach its review scores with a grain of salt, you just dont know if the controversy surrounding it will affect the game score regardless of the actual game quality.
