This is so wrong and how people end up with misbehaving pets that shit and piss all over. Dogs do remember things and using both positive and negative reinforcement is the way to go.

Trying to explain it in English is useless, yes. You have to communicate like another dog would.

The dog pees or poos on the floor? You take them to the pee, you point their face at it, tell them “no!” in a stern voice, then put them where they’re supposed to go.

Chewed up pillow? Same thing, but instead of putting them outside or whatever, give them something they are allowed to chew.

They’re not going to like it, but dogs nip at eachother to communicate when they don’t like what the other dog is doing. They’ll be fine.

But DO NOT hit your dog. You’re not punishing them, you’re giving them guidance. Dogs want you to be happy with them and you want them to trust you.

And also do the positive reinforcement stuff you hear about all the time, this comment is just not about that.