Making fun of newcomers who complain about ratings is the same as making fun of a newborn for their shortcomings like being unable to tie their shoes. "HA! Look at this baby, this weak sack of meat can only squirm and squeal!" I mean, yeah it's fun to laugh at helpless dumb offsprings, but don't beat them like a dead horse. It's slightly bad taste.
Even if there's already a million of lamenting posts on the forum, each individuals go through their own journey of maturity. Each have their own way to process what life throws at them. When their feelings are hurt, people share their thoughts with others, some try to create protection, some try to change others. With time and thinking, they eventually come to terms with whatever caused pain.
You cannot expect everyone to be at the same stage of maturity as you and feel tired of other's shit. "What? Your mom just died yesterday and you're still feeling bad about it? Geez, you should already be past it already! My mom's dead since 20 years, I've already come to terms with it already. Didn't those two millenia of religion and philosophy taught you anything about dealing with mortality?" Instead, the normal reaction should be a bit of empathy.
Eventually, authors must stop seeing the rating system as an objective accurate assessment of any work. And instead look at it as a tool of expression for users. A fiction must aim to arouse readers emotions. And emotional people troll, shitpost, and applaud.
Moreover, thinking oneself as the only worthwhile arbiter of which ratings is correct would be the epitome of arrogance. Is a rational exhaustive checklist of arbitrary pretexts more correct at evaluating an emotional piece of art than the lumped fruit of unspoken intuitions and emotions?
Considering all of this, I'm obviously the only enlightened user who can accurately judge a fiction, so I propose that ratings are disabled for everyone else but me so I can give myself 5 star rating, thank you very much for listening to my TED talk.