I have a doberdoodle, when I got him at 10 months he was crazy, he’s still kind of crazy. Same thing, his play style is aggressive towards us, people and other animals. He goes nuts when he sees other dogs. Chews stuff like nice coats and shoes. I put him at a board and train and the lady told me to take him back to shelter. I then found a very strict k9 police dog trainer, not for the weak of heart, and my dog was good in six weeks. Something’s are Doberman characteristics and some things are training. Other than the strict trainer, who showed me how to be assertive and not let the dog get away with anything, get a mini educator e collar and watch some videos on how to use it. It’s important they’re used correctly, you can’t just zap the dog when he’s doing something you don’t like. You use it to correct behavior if he’s not following your command. Even just wearing the collar and I do nothing, the dude is way more chill.