From an objective standpoint, this is gaming's best year since at least 2001.
There's nothing objective about one's own experience of gaming.
Especially because I could say that OBJECTIVELY the state of AAA games on release are knowadays far worse than they were back then, meaning you don't get to play in ideal conditions as we once were. Which discredits a bloat of big games people would come up on their list.
Anywoo, I agree to say this year can be considered amongst some of the previous stellar years we had in gaming.
Objective metrics = Aggregated reviews, consensus, sales, and significance. You can still have a different opinion on which year is more significant overall than which, but you can't base this on which game you personally prefer.
Objective is basically an outlook on what others think. The number of high scored and big sellers this year is too high, without COVID bloat.