That's kinda my point though, you should at least try, as you did. I'm the same had rescue dogs all my life, only had 1 that sadly had to go back, still makes those that have settled worth it, and it's still worth trying. It's a hill I'm willing to die on because I honestly don't see how people can buy a puppy when there's poor ones that need homes in shelters. You can even rescue puppies if people are that desperate for one. Worth mentioning that you can also get ones that have been perfect dogs their whole lives just had owners that have died or had to move away etc. There's plenty suitable dogs you just need to do your research, it's made much easier if you go to a large rescue place like the Dogs Trust. At the very least people should check out the shelters before buying a puppy.