I haven't given a rating/review on stories yet. I say when it's bad, its bad bad. Not just grammar but mostly touchy subjects and how they make light of it or use it often.
Things I have heard in stories that I would drop asap: racism, nationalism, misogynism, rape, plot and character development that just doesn't make sense. Other sensitive topics as well, especially if it seems not much research has been done on it and it's really off (not just a bit since authors always have some creative freedom with it) but so off the mark that it becomes offensive.
I mean if it's like set in historical time and your characters reflect the thinking of that society's time or your character(s) and there's some development maybe for them to progress and not think like that way, or received some trauma that is central to the plot and how they develop from that all that ties in with how they deal with the trauma. Or stories where it's war and conflicts so you have fictional races possibly in conflict with another and show some signs of racism and stuff but there is some development to move beyond that like some characters reflecting how it's just flat out bad and some things are being done change it to make it better.
But have heard lot of stories where authors just like writing those in (racism, rape, etc.) and it doesn't cater to the plot; it's pretty obvious who they are referring to irl. It's pretty racist, and superiority complex over others like justifying an excuse to be superior and get away with the things they (characters) commit. It's things like rape and misogyny in stories where it's like they treat the character like shit and the character still loves them afterward. Or characters become collection, and nothing after that. These stories are crap that I don't bother touching. Not really there for plot, the author just insert their shitty opinions/shitty writing development in just for the sake of it. Their stories are 1.0 and probably should be less. Thankfully the times I do search for books to read, I look at reviews and tags so I avoid these things, but have heard enough cases that it taints how others feel about these authors and other stuff about the authors.
And then for plot development. If the story just turns really horrible like it doesn't make sense at all, like if the characters and the plot is all over the place without some reason why. Like you have a character that is nice and kind and suddenly is an expert and goes all gun welding, knife slashing at aliens without any training whatsoever, and it doesn't explain how they suddenly switch in personalities, or suddenly became strong. Annoying clichés (esp. certain ones like OP/know everything, too oblivious, glorifying bad guys just bc they're hot even thu they do some pretty despicable things...) and its just that, it doesn't do anything to go out of it or make it better and the author is basically over reliant on these clichés that prevents better plot and character development. Character development doesn't change, even after an event that is supposed to make them reflect and change, or how they always just stay arrogant/make bad decisions without any consequences happening to them. Looking at these stories and how it's not as bad those stories mentioned above, this would be low too but maybe 1-2 ratings or maybe around 2 star ratings bc it just not as shitty as the ones above.
And ofc, if your story is straight out plagiarism like Tang Qi then it's automatically 1.0 and should be less too.
