I think it's fair game for one to say they personally don't find her body appealing, but it's an entirely different thing to call her gross, and disgusting. Because you have to keep in mind that your personal aesthetic doesn't necessarily have to align with the one Kim Kardashian has for her own body. And that doesn't give you the right to be horrible about it.
To me it’s clear she has a very specific aesthetic when it comes to what she finds an appealing body - mainly a tiny waist, flat stomach, wide hips, big posterior - and she shaped her body according to that aesthetic, probably via both natural and surgical methods, and then pregnancy and age shaped it further as they are wont to do, for better or worse. Point is she is obviously not embarrassed of her body, cellulite and all, which I find a refreshing attitude to have.
Some people like to corset train and have a tiny waist, other people like to stretch big holes in their ears, and others yet like having a disproportionately big butt. If these things are not to my taste I still wouldn’t call the people having them ‘disgusting’, especially since they are doing them on their own bodies! And if they are happy with the results, then more power to them.