Your DeviantART gallery is filled with random stuff people don't like random stuff on gallery
Feature your art in groups this helps very much getting favorites and views
Post Arts more regulary and slowly you will get more watchers over time.
Don't post things that aren't considered Arts (memes, public transport images )
The way i used to get more views/favorites/watchers
My Art is wallpapers. So i send them to Equestria Daily i get like 500 views and tons of favorites and downloads and some watchers (but this way works only on worth showing wallpapers ; very very good art)