Most babies love the snug, comfortable feeling of the Safe T Sleep Sleepwrap baby swaddle but if your baby doesn’t seem to like the wrapping sensation simply do the same as you would when they don’t like their car seat i.e. be loving, firm and consistent as ‘you’ know your baby will be safer.
Experience tells us that the most it will take baby is approximately 6 sleeps to get used to the ‘wrapping’ sensation when used ‘consistently’. After this it will be a blessing for all, also please consider if baby is teething, has acid reflux/reflux/gerd or colic at time of introduction, this may be what is making them unhappy.
https://www.safetsleep.com/collections/sleepwrap-baby-swaddles