I remember when DS was 2 days old (still in hospital for me) ... lying in his plastic fish bowl all spread-eagled and fast asleep
along comes midwife "I'll show you how to swaddle"
"no thanks, he's fine"
"don't be silly dear" .. patronisingly .. "here" .. and of she goes swaddling him
DS let out the biggest yell in the world ... and kept screeching and screeching till she unravelled him and put him down .. when he flung his arms out and fell asleep again
never tried again .. slept like an angel
I really think swaddling doesn't work for ALL babies .. DD hated it too