This is what ive done. Basically the problem seems to be the samsung photo gallery. By default any photos get opened up here first and I'm not sure if it's the AI or what but because the photo is sent here first then the auto post processing happens. As you can see the app doing it at the bottom off the screen and then the pic changes from good quality to awful. So go in the app, disable all permissions to access the phone photographs. Now it's a bit slower but you can then take a photo and open it up through Google photo's which I've always done on previous phones anyway. Only thing is I can't find a workaround to open up the photo in the camera app. If you select the photo in the camera app by default it will try to take you to the samsung galaxy gallery which then doesn't work so you have to come out of the app. But at least the awful post processing has now stopped.
