When aggregating, weighting can be idiosyncratic.
When assessing games or anything else, you and I can agree on every point but disagree on our total assessment. You and I care about different things, so your trivial detail is my game-breaking problem.
Depending on your playstyle, there are bugs you will hit more often. Crippling PvP bugs will not bother carebears, nor will PvPers care about your raid issues. Line of sight bugs will cripple archers while meleers chuckle. Some things are not bugs but design decisions that support or undermine particular playstyles. Imagine the poor wizard in one of Robert Howard’s stories, where long casting times and loud chants mean that barbarians can almost always gut them before they finish their best spells. Games can be rough on snipers because of enemy spawning conditions and distances, not anything about sniping per se.
What is an acceptable break from reality or continuity depends on who you ask. I can be visibly jolted by some movies’ violations of physics, but they do not really undermine my enjoyment unless they are plot-related or break the rules established within the fictional world. Other people will never forgive the Wolverine movie for Deadpool In Name Only. We can recognize the break but evaluate its importance differently.
You will frequently see posts about how X is broken so the game is Ruined Forever. Sometimes you agree. Sometimes you wonder what fool thinks that X matters at all while Y is ruining the game forever. It is always, always, always worth taking the time to comment that a post was not worth writing.