I like the fact you set yourself a task and worked through it. That's a good way to concentrate on your photography.
It's also good you've uplaoded the full original but as John and Ishan say, you can still upload your editied version. Not many upload a before and after to the Critique Gallery, which is a pity as it's useful.
This would suit a square or squarish crop, even a portrait format (more conventional) but whateve you choose, remove the flower on the right. It is a distraction from the mqin flower and that diffuse background that sets it off. And as it's cut through by the frame edge it looks more mistake than intended.
I was intrigued by your comment on V4 that that was the result of aperture priority, then you later commented about the sun bleaching the flower out. That's the crux of the matter, the harsh light on that shot, nowt to do with exposure mode.
I have no problem with shutter priority and your logic is fine in that you wanted to stop any movement. However, the resulting aperture chosen by the camera will have a marked effect on how the background is rendered. As this can make or break a picture, that's why most photographers in this field (no pun intended) tend to use aperture priority. For example here, going for a smaller aperture than you did would render the details more obviously so the flower would tend to blend in, which would not work so well.
Your +7/3 (on this original) did not have the effect John indicates because the lens couldn't be opened any wider to give that much compensation at your chosen shutter speed and ISO in those lighting conditions. When the sun was out, and conditions were brighter, it would do that.
There's some good advice re spot metering and manual exposure from others here.