The irony of your comment is that you actually literally proved that the only likely legitimate review 'tax' around is a 'PlayStation Tax'.
First, remove Stellar Blade from this because it's not a Sony owned game. I would personally add Days Gone there instead (Metascore: 71).
Second, you said fanboys... but in reality all those three Sony games (GOT, DG, and HDII) have sold around 10 million units each, which means the general (read: non-console war centric) gaming audience have in large number found those lower-rated Sony games to be worthy of purchasing, whereas in contrast, Starfield performed extremely underwhelming compared to other mainline Bethesda games, and both HBII and Forza bombed in a catastrophic manner.
A good illustration for this is Days Gone (Metascore: 71) versus Hellblade II (Metascore: 81). DG was released 3 years ago on PC (and that's 2 years after the initial PS4 launch), and it currently has a slightly higher player count on Steam versus the 2-days old Hellblade II which had a day-and-date PC release (and an 81 Metascore).
So either critics are biased against those very popular PlaySation games (read: PlayStation Tax), or somehow the better user reception and higher player count on
Steam is... because of
PlayStation fanboys? (it sounds dumb to even write / hypothesize this last bit).
P.S. check out that user review score of Days Gone on
Steam (91.4%) versus its Metascore (71), and that should tell you all you need to know about this so called 'tax' allegation.