Is it true if someone doesnt treats right with animals, they also wont treat good with kids?

How old are you, Mike? You do sound depressed. It also sound like you might have some anger issues. Consider talking to a parent or therapist about your concerns. There are programs and medications that can help you with your feelings. Meanwhile, it's probably not a bad idea to stay away from animals and children. I would advise that you wait on the vasectomy, though. Things change over time, and someday you may find that you want a family. Good luck.