These are all totally normal behaviors for a puppy. If you can hang in there until he's about 18 months old it'll pass. It's just exacerbated because he's a big boy. I just went through this with my standard poodle puppy - my previous dog lived to be 17 years old so I'd forgotten how rotten puppies were, haha. I'll post some training and management suggestions later when I have a minute, but in the meantime, Google "it's your choice" and "sit on the dog," both of which helped my pup learn to be marginally less infuriating.