Teddy bear sheet , am I doing something wrong?

[Vanfan]

I was late to the party in buying teddy bear bedding but I finally succumbed at the end of January during a particularly cold period. I got a nice dark grey sheet from Dunelm and was very appreciative of the warm and cosy feeling. It was delicious to be surrounded by such comfort.
Fast forward to the first wash and I see that the outline of my torso and legs can be seen in the flattened fleece. I wasn't too happy about that but hoped it might spring back after washing. It didn't.

So now after a few washings the flattened section looks more like a cheap brushed cotton with an added cardboardy feel to the bit where my feet go.

Am I doing something wrong? I cant see anything else about this online but cant believe everyone else is happy that the fleece gets matted so quickly and so thoroughly.

I have the teddy bear sheet, pillow case and quilt, albeit from M&S, and nothing like that has happened. I'd be taking it back.

I had one that went like this, bits kept getting stuck in it too and i couldn't get them out unless I picked each bit out so I binned it in the end. I have since bought a different type of teddy one, it's super soft and washes well and it's nothing like the weird cheap fleecy material I first bought

So they arent all like that ? I assumed that it was what happened to teddy bear fabric after a time -although this was particularly quickly. I dont have anything else made out of this fabric.

I thought that Dunelm one would be good enough quality . Does the M&S one have longevity?

I've had my set for over two years and while the sheet looks tired now, the quilt cover and pillow cases are fine.