Writing is a subjective art. What you might consider “bad writing,” someone else will think the opposite.
So “writing style” is much the same; some people don’t like certain writing styles. And that’s that.
Personally, there are some writing styles I’ve seen that I consider “amateur writing.” As a writer, I try to follow novels I’ve read and seen. A novel is supposed to be descriptive (not too descriptive where you know every nook and cranny, but enough to leave an image in your mind) and it should have a balance of details and dialogue. The grammar, spelling, and punctuation should also be correct.
If I see a story that’s more dialogue based or lacks details, I consider that “amateur writing.” If I see a story where the writer writes in all lower-case, I consider that “lazy writing”
therefore, “amateur writing.”
But this is just me. Other people might think of these as writing styles and they may like it. And that’s fine.
However, in my mind, if you’re trying to write in a particular style, there are different ways to write it. Like for instance, if you want to write all dialogue based and less descriptions, why not try screenwriting? Or if you want your story to sound more sudden, you can write smaller sentence that are more abrupt or something like that?