I was cruel to my cat a few times
What was your reason for being so cruel to your cat?
The cat would not stop crying all the time when i played my ukelele.
No matter what an animal does, it should never be abused. It can't help that it cries, that is its instinct and you're supposed to help it out and take care of its needs. You should never own an animal again because you might hurt more.
It's okay. I love animals and I'm buying the best cat bed that the money can buy.
Just know that since you made the option to adopt your pet, it is your job to take care of them. Pets are helpless animals, so abusing them is one of the worst things you could ever do. Your job is to take care of them and love them as a member of your family.