Awwww, he's gorgeous!
I think my partner had that 'OMG' moment when we first brought our BC bundle of joy home.
I knew that there would be many accidents inside, chewed up items around the house and all the crying that was to be expected with a young pup, but I think he just wasn't ready for it.
Our next one will be easier for him I think, already knows what to expect now
I'm glad that they returned the pup to you. Some people probably wouldn't even take the trip back or bother contacting you and just dumping her at a pound or something like that.
Hope she finds a wonderful home!