Deckbox Auto Deck Building

There is no feature currently available that will do that for you.  If you're looking for deck ideas, you can go to the "Magic the Gathering Decks" option under "Card & Deck Database."  From there you can designate a format and a few of the cards you would like to see featured in the deck.

That's about the best you can do. 

As an avid brewer, I think you're doing yourself a serious disservice and are limiting your abilities as a player to not just build your own decks.  Cultivating what YOU think is good or bad and then trying those decks (likely performing poorly for a while) will help you learn a lot more about the game, card interactions, concepts like card advantage, and lines of play than just taking someone else's build.  Further, if you don't want to be running into tier 1 decks and getting massacred all the time, the best place to learn the fundamentals is at the draft table.