Can anyone fix the problems inherent in the Nissan Juke since the 2011 year?

What is your question?

In the 6 months that I have had my 2014 Juke SL, I have had a dead battery, & my mileage has gone from 22 1/2 mpg down to less than 17 mpg in the normal driving mode. Much worse in the econo mode! Been to the dealer for service twice, nothing fixed except new battery. Car has 2000 miles on it. Dealer says mileage will improve in time. B.S.! P.S. The field in the "tell us your car" doesn't have allowance for "Juke"