ALSO: Cats do NOT do things out of spite! Cats do not feel spite. They are cats. Anthropomorphizing your cat to the point that you attribute human intent to animal behavior is dangerous for your cat (really for any pet but it seems to happen to cats more than dogs).
A cat not using the litter box isn’t trying to upset you. There are a NUMBER of behavioral issues that might result in failure to use the box, ranging from medical issues, to territorial insecurities, to just plain you not cleaning the box often enough and your cat prefers not to step in its own excrement. Find and fix the problem and they’ll start using the box again,I promise. It’s an instinct for them, not something you have to train.
A cat vomiting isn’t doing so to piss you off. I’ve literally seen examples of people who think this, but vomiting in cats is just as unnatural as vomiting in humans. It means something’s wrong. Maybe the food is upsetting their tummy; maybe they’re eating too fast. Maybe their food dish is gross (they need to be cleaned regularly too, especially if they’re plastic!). Or maybe there’s something else going on and the cat needs to visit a vet. Please don’t ignore cat vomiting as “just something cats do.”
A cat hissing at you is terrified, not mad. It’s not angry, it’s scared. Scared cats try to appear as threatening as possible, but given a chance, a cat will always chose to retreat rather than attack you. Back off and give them that chance or things might end up badly for you both. (And a cat that continues to attack unprovoked may have something going on in their brain that needs to be addressed by a vet as well!).
Cats scratch to mark territory and to sharpen/shed their claws, not to piss you off. Cat scratching is very natural behavior. If your cat is scratching something you don’t want it to scratch, like a piece of furniture, there are ways you can encourage them to turn their attention to something more appropriate. Put a scratching post next to the spot. Find a way to make the spot less desirable (we put tape on the corner of our couch because our cats dislike the feel of the tape under their claws). Make the scratching post more enticing by sprinkling catnip on it (if your cats like catnip–verify that first, not all cats do). And if the behavior is still a problem, you can curb it by trimming your cat’s claws regularly, or applying Nail Caps to their claws (easy, durable, and harmless, plus you can get them in all sorts of fun colors. Mix and match, or paint your nails to match your kitty’s claws and be manicure buddies!).
Please do not declaw your cat!!! Cats scratch. That’s a fact. If you cannot handle that fact you should not have a cat. Declawing is the literal amputation of the last joint of their toes. It hurts. It’s traumatic. It takes a long time to heal (longer than most people realize, because cats are really REALLY good at hiding their pain). They don’t understand why it happened. It changes the way they walk, their posture, and can lead to the development of arthritis. It leaves them defenseless, unable to climb to escape or defend themselves easily if they encounter another animal. It is literally being ruled as inhumane in more and more places–because it is.
If you have to change something fundamental about your cat to make it a palatable pet for you, then it’s not a good match. Find a different animal. Please.