This.

Tell a story with the photo. There are millions and millions of photos out there, but only YOU have your viewpoint. Only YOU have your intellect and knowledge. Tell a story, it will be unique and people might like it.

Also, Instagram is not the measure of success. I know a few photographers who are good, even excellent, and have more Instagram followers than Sebastião Salgado, who in my opinion is the best photographer walking the earth right now.