Raised properly, they don't get separation anxiety, but even sans that issue, they're energetic and inquisitive in the extreme, which can add up to 'destructive' if they get bored.
Dealing with even domesticated animals means dealing with them within the framework of their own psychology. With dogs, you have to be the Pack Alpha. And if you're not, the dog will assume the role.
He is very attached to routine too. Right now im having coffee on the couch andbhe laying with me. This is very important to him and he will lead me to the couch on the morning if i try to sit at the table. Nope. Gotta be on the couch so he can lay next to me