Ever give up on a puppy?

My wife and I made the largest mistake of our married life. Worse than running up credit card debt. We decided our son was ready for a dog. He had been asking. He is 6, so we decided on a rescue dog/puppy. Got a cute 8-9 week old mutt. This is the damned Marley and Me dog. I've raised dogs before. I've never encountered one this stupid. Potty training is a disaster, but not the worst part, it is actually improving. EVERYTHING else is a disaster.

Chewing/mouthing/destroying. As I type this she pissed on the floor. They typical commands of a stern "no, drop, down" do not work. When she play bites with you typical techniques of two finger tapping the nose with "DROP" or squeezing her snout when she is biting a hand/finger too hard DO NOT WORK. She just continues to think you are playing. I would have to reach a point where I am afraid to crush her snout. Making matters worse, her favorite chew toy is our 9 year old chihuahua. She has typical chihuahua "frick you" attitude. And she has the beginnings of arthritis. She tries to establish dominance but this puppy is too stupid to register it. She trots off but is right back whenever the thought goes back to her retard head.

Cesar Milan? I've watched Dog whisperer off and on many times. Each episode is the same. 2-3 finger poke and a command word to stop an unwanted behavior. When none of that works he uses the hand to pin the dog on its side and make it submit. This does not work. She still fights like you are playing. I got her one time. On her side pinned down and she believed I was serious. Again, only using thumb, index, and middle finger to simulate a bite. Only used the amount of pressure needed to hold her down, and this dog LOST HER shite! I really felt bad. I've never heard a dog howl like that unless it was in pain or being beaten. And she would not stop. I had to let her go.

Making matters worse, my 6 year old son was NOT ready for a dog. I knew we would be doing the dirty work, but he wants little to do with the dog, and is put off by the dogs rough and tumble nature. Still just a tad too young and immature to give back what the dog is dishing out.

In the end I will be the a-hole. Discipline of the dog and the dog will fear me (needs to fear someone) or return the dog while still cute enough for someone to snap up (puppies dont last at CAPS), which will certainly make me the villain.

TLDR


ETA we are also now trying the Bitter Apple spray which works but you can only spray so much and on so many things.

Thanks in advance.