There are many ways to become a better photographer. Here are a few ideas:
Also, if you are wanting to sell on Adobe Stock, you also need to understand that Adobe Stock are not judging quality, they are judging saleability. Two of your pictures would fail their tests, whoever took them, because you don't have a level horizon and you are experimenting with having elements out of focus. (Why? One reason is that the purchasers of single stock photos are not art lovers, but they think they know what is technically good; if they find out of focus work they consider it as low quality and this may affect their whole impression of Adobe stock. They may not be right, but they are the customer). This may make great art, but Adobe Stock aren't a gallery. When you are close to your own work, it can be hard at first to step back and look at the commercial prospects.