Whatsapp keeps decreasing display picture quality?

Images that used to be displayed just fine are now displayed in low quality even though they are square fit. It decreases the quality of any image I set as display picture this never used to happen before. I tried uninstalling and reinstalling what's app as some recommended but it did nothing. And apparently I'm the only one in my corcle who has this issue. Some suggested to clear the app data but I don't know how to do that on iPhone. Any suggestions to fix this?

They are trying to save money.

I don't know don't have that app