Coop pillow sinking too much

For the first time in my life I’ve splurged on a more expensive pillow, and since I’m a side and back sleeper I ended up wanting to try the Coop Crescent Cool+.

Although I like the shape with room for my broad shoulders, I have the problem that the pillow is sinking way too much in the night. I’ve been using it for 2 months and my neck pain only worsened from the pillow.

I have already used almost all the extra filling and fluff it up every morning. But while it’s big and fluffy (almost too fluffy) when I go to sleep, in the morning I end up in a ‘hole’ in the middle with all the stuffing being pushed in both ends of the crescent shape.

Is there anybody that experienced similar problems with the Coop pillow? Or any alternatives that maintain their shape better throughout the night?