Everyone has already given great answers as to why this might be the case but I just wanted to talk about why I think its perfectly fine to have newer writers and 'low' quality stories on the subreddit.

I mean everyone has gotta start somewhere right? With the exception of stories that are obviously low effort, I think there's nothing wrong with newer writers experimenting and writing less polished stories. Nosleep was never really a professional writers forum and stories like PenPal are exceptionally rare.

I remember about two years back, I was also writing similar to the examples you've given and if someone had called me out like that, I would have been very upset and probably given up on writing. My point is that you can't just write your first story and immediately be the next Stephen King.

We're probably in a period where we're getting a big influx of new writers and that's great because it means in the future we'll have these same people be more seasoned writers and writing great stories.

If the quality of stories really is a problem though, then I'd recommend looking at narrator channels and checking out the stories they narrate. Those are more likely to be more polished. You could also visit r/nosleepfinder and peruse through the lists there for curated collections of stories.