I really HATE my staffy now

I used to adore and worship her. But now shes just relentless. She destroys everything, eats the walls, tears up every duvet i buy her. She squats down right infront of me on every new rug we have to buy, she eats shit from the field and cat litter box and shits all over the house. She is super heavy and just runs like a bull on into the room knocking everything over and breaking ornaments. She doesnt listen to any commands anymore. She eats our underwear and throws it up. She keeps going to the bottom of our bed and peeing and wouldnt dare pee near her own blanket. If were eating she gets put out of the room, she doesnt like it so she pees outside the door then runs and hides and shakes. She was so well trained, i have trained 4 dogs in my time, 2 staffys and 2 yorkies and none have been this way i am very strict and to have her blatantly disrespect me when i treat her like royalty what other dog gets a new duvet every week? She gets the dearest and best food in the petshop. I just cant tolerate her anymore its turned to hatrid and i have her locked out in her dog shed out the back yark and dont like her indoors anymore. She makes me furious when shes around me to the point i just want to slap her silly. Its got so bad i dont even love her anymore. Shes like one of them disobedient kids in the mall that scream and run wild and act up. I just cant take her shit anymore and i dont know what to do.