I don't care about my pet cat anymore
What did you do with the cat?
I sent the cat into the forest to get rid of it.
It is wrong to have done that. If you did not care about the cat anymore, you should have given it to a shelter or someone who can take care of it.
I'm going to get a new cat. One that I could control.
If you could not control your first cat, that is on you not training it better. You have shown me with your actions that you are not capable of taking care of a pet, so you should not get a new one.