Clowns I have a child with ASD who dislikes dogs and a husband who really doesn't care much for ours, and I won't deny it has been more stressful dealing with them than the dog itself...My dd however and older son adore him and I am a real dog person (despite never having had one before except to borrow) I don't mind chewing and mess and I love the way the dog gets me out of the house and away from other stressful things -people, tidying
If in your heart of hearts you don't feel supported or able to cope with this, (my children btw are 17 and up!!) at this time, you mustn't be afraid to return your puppy. He will find the perfect home if you return him soon enough. My puppy was 12 weeks when I got him, to my mind the perfect age to get an already socialised puppy (mine was used to the company of other puppies and children)
Perhaps in another year or two will be the right time, and in my experience I don't think there is anything wrong with an older dog, after having this one, I am very pro dogs of I year and older!!!! Also I wonder whether poodle crosses are nippier ( I have one) and my previous experience was of a crazy but non nipping springer spaniel of 5 months plus.
Please don't feel you are failing by changing your mind, ime, an unsupportive husband at this is very very draining. (dh was, and still accuses me of only caring about the dog)