Ohalvo, I went through the same thing. Had a bit of a breakdown in the middle of the night when we tried to move Pip into the kitchen and he screamed the place down, after so much broken sleep and the intensity of the first week it was all too much and I completely lost it. Dh had to get out of bed, come downstairs and order me upstairs to bed, while he took over with Pip ... and I've had dogs for over 24 years, only one of which wasn't a pup when we got her.
I agree with everlong, that there can be a kind of PND thing with a new pup, as it's like having a newborn, with the overwhelming sense of responsibility, trying to do everything right and lack of sleep - except you also have sharp bitey teeth and scratchy claws to contend with, they have no nappy to contain their bodily functions and they are mobile so getting into everything from day one. Add into all that the fact that you also have to learn how to speak their language and communicate with them, while they are doing the same with you and it's no wonder it's overwhelming.
The only thing lacking is the hormonal element, but actually, it's now been scientifically proven that looking at neonatal mammals, such as puppies, does provoke a smaller version of the same hormonal feelings we get when looking at human babies, so there's even an element of that involved.
Fwiw, I think it only feels that bad if you care. Owners who just buy a pup on a whim and don't care about it's needs or making sure it grows up to be a reliably and enjoyable member of the family and doesn't negatively impact on anyone either at home or out and about don't have the same stress, so they don't get the emotional overload. Imho, feeling overwhelmed is often (but not only) the sign of a good owner who's going to end up with a lovely dog at the end of it all.
Of course some people are fantastic puppy/dog owners and breeze through puppyhood without ever feeling like this as well, but they are probably also the kind of people who are always in control and breezed through having a newborn and imo are probably in the minority.
It does get better. Having felt very similar to you, despite many years of experience, I have was sitting here this morning with Pip curled up asleep on my lap and realised just how much I love the little Rascal.
Everlong's advice is spot on. Just like having a baby, get someone else to watch the puppy - or leave him in his crate for an hour and just get out of the house without him for a while. Go and have a coffee and read the paper in a local cafe, pop to the shop, buy yourself a magazine and a bar of chocolate and curl up with a black and while movie, have a long bubble bath - whatever re-charges your batteries. All the same advice you get when you have a newborn actually. Being in sole charge of a baby 24/7 is physically and emotionally exhausting.
You are not alone - and it will get better.