Not a fix for this particular issue but I usually filter out reviews that have less than 20 - 30 hours of gameplay, depending on the game. That way you only see reviews of people that actually played the game.
If I don't like a game due to bugs or technical problems, I will very likely not play it more than 5 hours (disregarding actively developed games that were changed drastically).
By filtering out all reviews below 20 hours, you will lose all the reviews who couldn't play due to technical problems etc.
Reading the reviews above 20 hours definitely provides the benefit of them having seen a lot of the game, but you should not disregard all below that threshold.
True, that could probably be an issue. Then again, running Linux, most users technical issues might or might not apply to me. For that I usually check ProtonDB beforehand.
If it's not an absolute basic review it should definitely talk about bugs.
It's not a perfect metric, but I still find it better than hundreds of reviews with 0,5h of gameplay, raging how "woke" the game is.