My son DESPISED swaddling. Which the nurses knew on day 2, and which was confirmed throughout various attempts over the first few weeks. Wouldn't sleep unless totally exhausted, was "miserable" / struggling in it whenever he had the energy to... was just an unhappy baby.
The first thing my son did when he was born was to "stretch". The nurses laughed and took pictures of "The easiest baby to measure Ever." (23.5 inches). From that moment (when we didn't attempt to swaddle him) to this day 8.5 years later, the boy sleeps GREAT, and like an octopus. Arms over his head, or out to his sides... legs splayed. He's like a cat... takes up far more space than should be possible due to physics.
WORD TO THE WISE: Very few babies hate swaddling. For those who do, they also *usually* hate bassinets & cosleeping. They want SPACE. They don't want their arms or legs hitting anything.
HOW TO GET AROUND THE STARTLE REFLEX: Slide them down your arm (I had to ditch my watch). Always keep contact on their back, and hold them "snug" with both arms (if sliding down left arm, use right arm to press into the other side of them) as you lower them. It's a gliding sideways motion, instead of a lean down lowering motion. Once they're on the crib mattress, slide your hand out from under their back. I also found that stroking eyebrows would snap flutting eyelids shut (blink reflex put to good use) if the motion of removing your hand starts to wake them.
((Hehehe... the eyebrow thing did a bit of unintentional pavlovian training. To this day, 8 years later, no matter how bouncy and wide away my little trouble maker is... if I start stroking his eyebrows he gets instantaneously drowsy... eyelids start drooping, yawns, then he swats my hand away and groans "Mo-om!" Love that.))