I don't see how the quality of a video game could be a "fact". There are popular opinions, but also unpopular opinions, that's all.
And so, the quality and success of a game, or a game system, can be quantified objectively only after an analysis following strict criteria.
One could say, e.g., that a game system is "successful" if it makes the expected profits or surpasses them.
That would be a strict criteria, and you can compare numbers objectively.
One could say, e.g., that a game is "successful" again following the same criteria.
One could say also, that a game has high "quality" after making a survey over a big sample of players.
Each of their opinions is subjective, but given the sample is big and unbiased, the results of the statistic analysis become objective.
If you define "success" and "quality" based only on your own belief and preferences and nothing else, well... that is not a "fact", that is just an opinion, and anybody can end up in living in a bubble if they trust their own beliefs too much and avoid looking outside and being objective.