I don't know what's wrong with me

I really need help. I rescued a cat so that my husband could have an emotional support animal as he has PTSD. However I hate the fucking cat. He is always scratching me and walking right in front of me so that I end up tripping over him. He also scratches all of our furniture no matter how many toys we buy him. My husband won't let us get rid of him and honestly sometimes I feel like killing the cat. I've never wanted to kill an animal before and I think people who kill animals should go to prison. I don't understand why I feel this way.

We have tried training him using a spray bottle whenever he misbehaves, but it hasn't worked and he can't be an indoor/outdoor cat because we live in a fourth floor apartment. We are not okay with declawing.