Im going off of on my GF since she called me a bad pet owner
Yikes, why did what she said to you make you so upset?
Honestly, because I know she is right. I'm not a great pet owner.
It is pretty mean for your girlfriend to call you a bad pet owner, but maybe she was right to do so. If your pets are not happy living with you then you may not be suited to own the pets at all. Either way, this should be a wake up call to want to treat your pets better.
I will show her! I'm going to put this cat put to sleep. That dumb cat is the one who caused all this anyways.
Surely there is a better option than killing a cat for no reason. Just bring it to the animal shelter where it can be adopted by a loving owner. Not everyone is cut out to be a pet owner and that's okay, now you know that you aren't a pet person.