Why do some people derive pleasure from the misfortunes of others?

Some people derive pleasure from the misfortunes of others. It's already common for Filipino people and that's one of the characteristics of Filipinos. Sometimes, we derive pleasure because we just wanted to insult others and laugh at them. There are also times that we just want to pull them down. Just like crab mentality, this can be described by "if I can't have it, neither can you". Competitions are also common to us. We don't want others to be in higher place than us and we don't want them to defeat us in all aspects. It's just like being not willing to allow someone to escape from bad situations so they cannot get ahead or they cannot pursue what they dream to do. The first thing that comes to our mind is to be jealous of what others have that we can't have and also to be selfish and desperate to pull them down. We also take advantage to their misfortunes that's why we derive pleasure.