am I doing something wrong?!?

Marika • Momma bear to two little Cubs
My daughter is super strong and going on 15 weeks she is starting to break out of swaddled and really hates being swaddled but that's the only way she will sleep. After much research we purchased the magic merlin sleep suit and I was so excited to use it after all of the wonderful things I've read but oh my goodness does my daughter hate that thing, she still jerks a lot in it, I tried putting her in just a onesie and the suit and then just a diaper because she seemed warm but I'm wondering if there is a trick to using it or if my child is just one of the few that hate it? Please help I am so tired 😫😫😫