You need to try and view your own work through impartial eyes. I agree 100% with the feedback provided by Ricky336. Especially the overexposure. It's very bad in the vase. You likely need more separation between your subject and background. Flowers are very commonly photographed and submitted to Adobe Stock. There are millions and millions of these images. For an image featuring a commonly photographed subject like this, the image needs to be technically perfect and should have a significant WOW factor. Unfortunately, this image does not meet either criteria.
Better luck next time,
Mat Hayward