To be honest, you may be worrying a bit too much about something small. I'm no writer myself, but I totally understand your position. There are very few writers on this site that can pass an analysis through copyediting with few changes, most of them mods or extreme veterans as well as GP members. When you're checking something, there's no personal bias, so you can spot an error or something that just doesn't sound "right" and fix it right away. Proofreading an analysis of your own is a bit different, as when writing it you really think that you've gotten everything correct. I've written a couple articles, and when writing I never consider I'll need any GP changes. When I proofread them, I don't see how something could be considered bad wording because I wrote it myself; it's very difficult to think that anything you've written is "wrong". That's why the GP team is necessary to find these sentences. I was on #grammar with jumpluff when she was working over said check and having a second voice really helped me understand how some of the things I said didn't make much sense. Jukain might have been a correct with the "don't know how to write in english" thing, language isn't really the issue. There's a certain style of professionalism and voice that most writers fall into after some time, and that's the kind of writing the blends together on the site. You can hardly tell the difference between writers after time. As a new writer, you don't really have that much experience with this style of voice and prose while you're writing it, and can only go based off what you hear in your head when writing. Jukain was speaking the truth when he said that it will come in time, but it has nothing to do with your language. It's not a lack of knowledge of how to write in english, but how to write in "smogon".
I'm sorry if this isn't what you wanted to really hear, but that's my view on the idea, at least. The only way to "perfect" writing is through practice, and that means a lot of practice. All I can suggest at this point is to use the stylistic changes that were made to not write them again in the future. You're a fast learner, so I am 100% sure the next thing you write will be much improved. I've seen other writers go through the same process, and the 2nd "full" analysis (a longer, important, multiple-set one) is always exponentially better than the last.
I was kind of all over the place in this, hope it makes sense. Don't worry about bothering me either, I enjoy trying to help!