Your research has given you the answer to your own question. The fact that you asked these questions, didn't get asked ANY questions, and know in your gut all the red flags...I would ask for my money back and keep looking for the right breeder.
I know you fell in love with the puppy when you saw it, but better to walk away now than to have your heart filled by this puppy once you have it home and then some serious (untested for!) health issue comes along and the puppy dies or you watch it suffer its whole life.
You already know the answer and I think you just needed us to confirm it. Definitely run from the red flags and look elsewhere for your puppy...the right breeder is out there. I promise
Welcome to YT!!