Why do people abuse animals just because they are frustated with their life or to take revenge on others.

@Strapmaster all of such ppl i came across became wife abusers/beaters in traditional societies, ended up in duty based boring marriages, always fighting with their partner or in modern societies ended up alone going through multiple divorces.

@Strapmaster Bassel Chibani named writer on "Quora" website, a popular writer does that. He kills stray animals when frustated.
He told me in that website privately when I was 20 years old or something.