Shadow Ferret.
I'm a little younger than you, and a lot newer to this forum. I haven't even been writing many years. But I have been working with writers for many, many years, some I have even 'trained', and a few I have been privileged to give their first break. For what it's worth, my advice would be this:
You've already been given the answer several times in this thread, albeit somewhat obliquely, but here's a spelling out. THERE IS NO ANSWER. There is no magic button. It makes me want to cry sometimes, reading posts on this board and watching people desperately reaching for that 'rule' which will guarantee success. Maybe if I avoid adverbs. Maybe if I really learn how to show not tell. Maybe if I change the POV. Maybe if I cut the prologue. There is good common sense in all of these things, but none of them are any more than tools in the box, they are not themselves the design you want to follow.
Yes, we all need to hone our craft. All of us. But there comes a time when we need to stop looking at the craft and look at the thing we're building instead - and the fact you're feeling as you are suggests you've reached it. I had a look at your Ants Flash piece, and one thing leapt out immediately. You did something I have never, ever seen a professional writer do: You weren't happy with the writing, so you changed the story. You added characters, a backstory, and a whole narrative in order to make a piece of flash fiction work.
Uncle Jim has said it many times, but I think it's worth repeating - if only because I frequently need reminding of it myself: The Story is King. The writing is there to communicate the story, not the story as a vehicle to show your writing. Forgive me if my diagnosis is off, because it's based on a single sample, but it looks to me personally as if you have been trying for so long to work on your writing you've almost forgotten what it's for.
What I'd suggest is this. Try to rediscover the joy of it that made you want to start writing in the first place. Wait till you have a story. Do NOT look at plot ninjas, story-generators or any of the other hack-devices - come up with a story you personally want to tell. Then sit down and write the hell out of it. Write as fast as you like and don't worry about the quality of the writing - think only about that story and telling it to an audience of one: your reader. Enjoy it. Only when it's finished should you look at the writing, and even then, only consider whether it's serving the story or you could tell it better some other way. You might be surprised at how well it turns out.
Honestly, what you're going through happens to all of us sometimes. It did me when I first came to AW. I wrote my first novel out of sheer joy, and without having much of a clue what I was doing. Then it sold and suddenly I had to write another one. The panic! Suddenly I had to 'learn how to be a writer'. For months I was blocked, until I finally learned how to go back and do what I did the first time - just tell the bloody story and forget everything else.
Try it. A singer has to do a lot of scales to train her voice, but she won't give a great performance until she learns to put her technique into the background and her soul into the song.
You've been doing scales a long time, Shadow Ferret. Now it's time to sing.
Louise