Is it normal to want to hurt/destroy things and people?

Not OK.
what you dislike is not people or animals.
It's how you've been treated.
You can do better.
Don't let anyone tell you anything else.
My guess is you have just you to rely on.
That doesn't make it easy.
But it's still a choice.
You can choose to move forward, or you can choose to fail.
I hope you make the right choice.