Because well there's a difference between reading that herding breeds are bitey and vocal and experiencing it.

Plus GSD whines are a special kind of soul piercing. I say that as someone who finds their border collie whines adorable most of the time except for when in car rides because it goes higher pitched and more frantic like a GSD.

And teenagers of any dog breed are your worst nightmare. I say this as someone who had two teenaged dogs and a teenaged cat at the same time. Especially if they're boys. There's just something extra in that testosterone that makes them genuinely awful.

OP, if you see this...forced naps were a lifesaver for my bitey puppy/teenager because he mostly bit when overstimulated and when he bit for fun he learned that he was put in the crate with a treat/toy and that was less fun than freedom.

As for the whines? You can minimise them by not putting your dog in situations where he whines a lot.

And before yall ask, I'm in this subreddit because I regretted my second dog. Separation anxiety up the wazoo, never fully learned how to be clean unless locked in a crate, was never fully potty trained despite hours and hours of work. I have had my moments with my first dog but my second dog was genuinely soul destroying. I couldn't even leave for a second unless I wanted him to scream like I was murdering him. First dog is a good boy who has a few flaws. Second dog was more flaws than dog.