@Kristoffer2409 I don't know what happened here but your cutout is really blurry. I'll remind you again, you have to make sure that the cutouts you're uploading are sharp and of good image quality. It's pointless to keep uploading blurry cuts that won't be an improvement compared to the persons' current MP cutout.

@Kristoffer2409 Can you try doing the cutting process exactly like in this video? It shouldn't become blurry then

@weeniehutjr, It happens when I rotate the image in GIMP. Don't know why that leads to a lower image quality. When I rotate before rescaling there is less quality reduction. I will try using Photopea.

Photopea doesn't have the rotate function. Use this site to rotate the source image before cropping it and putting it through remove.bg.

You can rotate images in Photopea actually - tick “Transform Controls” with the Move Tool selected:

And then you can click and drag around the edge of the layer's bounding box:

Mind blown 

@mons Haha! Yeah, I found the rotate function in Photopea, so I already started using it. Thanks!