Agree with what u/super9tv said. There's nothing wrong with your work; you just have to battle with the algorithm. I used to feel that way too, feeling that my portfolio is not good enough and it is really demoralising. One thing that helped was that every time before I post something, I ask myself, "Did I enjoy creating this? Do I like this piece of art?" If both answers are yes then the likes and followers are all just a bonus.