I feel like I've seen this plot quite a few times - two young people get into a toxic relationship where they just use each other

For the ML, he is dealing with grief and is very closed off, and because of that, he is outcasted. For the FL, truthfully, I'm not sure what her backstory is. Somehow, these two characters form a sexual relationship. And although he claims to like her, he treats her like shit. And she denies liking him for a while.

I feel like this film is hypersexualised. From what I know, the source material involves a lot of sex. And this has quite a bit as well. But I need I remind you, these kids are MIDDLE SCHOOL STUDENTS!! They're not even in high school. They're around 14-15 for a majority of this film. And I'm watching them have sex... It's weird, and honestly, feels unnecessary. They could have aged them up to at least high schoolers

Like I already mentioned, the plot feels stale and overused, and doesn't add anything new to coming of age films. I have given it a high re-watch value because I do want to eventually watch it again and try to understand it better, and maybe gain a new perspective.