Most people already covered what I would've said in response to this, but I'll add something that hasn't been said. You say this: "I am not entirely shitting on the creator but you have to realise what you are writing about and what you are advertising as an attractive character right, like I know it's in the warnings and it pretty obvious it says 18+ but EVERYONE who likes this game is 12."
But there's literally a content warning on the game page. Generalizing everyone who likes the game to be twelve year olds is insulting and targeted no matter how you word it. I'm twenty-two, I enjoy this game. And there's more depth to it than you seem to realize. No one is pointing out the issues, because they read the content warnings and decided if it was or wasn't for them. You say people are so quick to shit on others when their opinion is given, but you gave your opinion first and did so by calling the people who like this game twelve year olds.
Not saying other people won't shit on others because they gave an honest opinion. But you gave a *targeted* opinion, and your wording makes it sound like you're trying to make people feel bad for enjoying something you don't.
I'm not saying you have to like the game, it's important to be aware of what types of media you do and don't enjoy. It's not for everyone, nothing is. But I am trying to give you another perspective in hopes you be more mindful when making comments in the future. Writing reviews is great, but targeted opinions that seem to be trying to shame others isn't.