I wouldnt worry about it and would not feel inadequate as a mother! Everyone is different when they sleep, I like to get the blankets all tucked around me and sleep snug and my husband barely covers up and sprawls out. As long as your baby is getting the time outside of his Burrito to roll and work the muscles, I would not worry about his sleep preference. I am sure it is annoying since you have to get up and rewrap him, but this too shall pass. Some day you'll wake up and miss the nights when you got that extra 5 minutes of snuggle time in!
If you really want to try to break him of it, perhaps you could get some activities for him to do in his crib, like the Fisher Price aquarium etc that would let him hang out in the crib and do something, perhaps even fading off to sleep with out being wrapped. That could help get him used to being in his bed and not being swaddled. I think some of those crib toys even have remote controls that you could activate the music/lights from teh doorway at night so he could be soothed back to sleep that way, with you him needing you in some way to assist him back to sleep. It worked for one of our twins but not the other (just for night wakings, not swaddling, they were too cramped in utero and never liked to be swaddled after birth!)
Good luck!