Oh no! Poor Quinn. The past few months have been rocky for him. You really are an amazing person for all you have done and continue to do for him. I'm sure he knows that he is loved now. Sending happy thoughts and hugs to both of you!
Its very hard not to be judgemental, but when I deal with folks rehoming their dogs, I do try to be kind.
At least until I get the dog out of the home.
Then I vent to my dog rescue friends.
Sometimes, you just have to.