Victor
I had a cat named Victor who did not like the fact that we moved houses a lot after my parents divorce. We lived in two rental homes after that, and in both houses he peed everywhere. Because both houses were all carpet, we could not do much to stop it. So in both houses, we paid several thousand dollars to have the carpets replaced when we moved out, because he peed on them so much. It was usually in closets or corners. After my mom got remarried, we moved into my step-dad’s house, which was all tile except for the bedroom. So we spent a few a hundred dollars buying metal gates to put up in the house to keep him out of the carpeted areas.
When we rushed him to the vet one morning because he was so sick that he could not even walk(at only 7 years old), we did everything we possibly could to save him. Unfortunately, he had a seizure and passed away. He’s buried under one of our oak trees. We spent many thousands of dollars on this cat, despite all the trouble he caused. Why? Because we loved him. He was our pet, and when we got him we made a commitment to take care of him.
Nelly
My personal dog Nelly cannot be around people, and she cannot be around any dogs besides foster dogs. Until she really outgrew the puppy state – which, with Border Collies, is around 4 years old – she drove me nuts. I have dealt with some serious behavior issues, and still do(she is my problem child!), that even I(someone who has fostered more than 20 dogs and worked with multiple dog trainers) could not fix…but never once did getting rid of her cross my mind. Because the day that I got her, I made a commitment to take care of her for the rest of her life.
You learn to love them despite their flaws.
But some people run into a few problems with their pets, often times problems that are very fixable, and they quickly jump to the conclusion that they should just dump their pets on someone else. Get rid of them like they’re some kind of disposable object. And that is where dogs like my current foster, Tweed, come from.
My foster dog, Tweed.
The people only had him for FOUR months before getting rid of him! And here he is after almost 3 months in rescue(and even longer in a shelter before I pulled him from there) still searching for a home. Because he’s scared of people and scared of being left alone, nobody wants him. His owners, the only people in the world that were supposed to love this dog, could not see past his problems.
It makes me so angry when people treat pets like they are disposable. They encounter some difficulties and figure the best thing to do is just get rid of the animal that they made a life-long commitment to. Having animals is not easy, they are not perfect. And anyone who expects them to be, or is not willing to put in the work to fix problems that arise, should not be owning pets.
Foster and Photograph 
This touches base with me so well, we have four border collies on 9 acres, one of which we took in after the owner decided to get rid of her for a new puppy. She had behavioural issues, especially when it came to the broom which we suspect she was hit with it. All she needed was a bit of TLC to bring her out of her shell and now she’s a bright and beautiful thing.
Another border collie lover in my town took in a puppy shortly after we took in our beautiful girl. Turns out this puppy was the one the previous owner of my dog had bought to replace her with. He had been tossed aside just as ours had been by the same owner! I couldn’t believe it, he even exhibited the same fear of the broom that our dog had as well.
A good deal of consideration should go into adopting an animal, I definitely agree whole heartedly with you and your last paragraph sums it up perfectly!