not by no means, but at the same time take a good look at what WOE will fit your life style and make sure its something you can stick with.
For me, it's unrealistic to think I can get to goal by JUST the way I eat. But I'm a slug in the exercise department. HOPING to change that...but so far it's a no-go. If you can't stay OP for long, find out what your longest time OP is. IF you want to stay on Atkins, then baby-step it. if 7 days was your longest time OP dare yourself to go 2 more days OP and see if that works. Or when you feel the urge to cheat....allow something a little higher in carb but not a total carb blow-out. (and all the while I'm saying this I'm trying to figure out how to follow my own advice). Hope all goes well and keep trying
You'll find something that works for you again 
