Well why do you make art? Is it because you enjoy being creative for its own sake, or because you want publicity out of it?
Artists of original work (ie. not fan-art / fan-fiction / work inspired by an existing universe / etc.) who aren't in the top 1% of the skill group will always find it difficult to get noticed. If all you care about is pageviews then draw fan art of popular media. If you value your own unique creativity more than that, then don't worry about how many pageviews you get - just keep doing the work you enjoy doing, and if people like one in particular then do more like that. (I see folk liked your charcoal Marines drawing - roll with that, do some more charcoal action drawings, or some more military art.)
My page has thousands of views and gets likes/comments every day... but it's on my Photoshop resources, not my actual artwork.
Also - Deviant Art is a bit like throwing your art into a hurricane and hoping it gets blown in front of a television camera. It's MASSIVE and that means it's really impersonal. You might try finding a smaller online community with similar interests to yourself and post your art there where people who like the same things will see it and might appreciate it more than the hordes of users who only visit Deviant Art to see the latest Pokemon fan-art.