I'm sorry you've received some pretty unpleasant answers OP
Pay them no mind - young puppies are hard work and can be really stressful. It's not always easy to see the wood from the trees when you're sleep deprived and overwhelmed :)
If it makes you feel any better, what you're experiencing sounds relatively normal to me! It will get better but those puppy/teenage months are bloody tough.
It's relatively common for dogs sleep routines to change as they grow - our beagle didn't sleep reliably through the night until he was about 6-7 months old. Up until that point, he still asked to be let out probably twice a week on average.
You don't need to wake him up - you just need a system in place where he can either wake you up himself - so either have the crate in your room so you hear him when he wakes up, or have a doggy cam set up downstairs so an alarm goes off when he starts to stir. Ours slept in our room and tapped on the door when he needed out (he never once toileted inside overnight) but I know that's not for everyone.
Re. the nipping. It's normal but it's happening because your dog is trying to tell you he's uncomfortable. Lifting is not a natural behaviour for dogs and they don't tend to like it much. It's easy with small dogs to get into the habit of lifting them but I always say to owners - what would you do if you had a St. Bernard and couldn't physically lift him?
Use a lead and treats to entice him. We used the command "off" - a light tug on the lead and treats to entice him down from where he was. As soon as he had all four paws on the floor, he got a treat and lots of praise. Soon, you can get rid of the lead and treats and just use the command and lots of praise.
Lots of positive association for grooming and touching feet/paws. Start slowly, just touching one paw, and treat. Build up to touching all four paws, then you can move on to drying the paws and between the toes. I would put a towel down on the floor and encourage him to walk over that while you work on the positive association too, and if his feet are still mucky, just keep him in the kitchen for a while until he dries off :)
Has he been to a groomers for an puppy grooming session at all? If not, I would highly, HIGHLY recommend it. Good luck!