That's a horrible way to behave! Most people, believe it or not, are not actually out to make someone else's life miserable. Treating people horribly to make yourself happy because OTHER people you perceived as treating you horribly... then you're just creating more people like yourself!

You're totally not justified in intentionally causing others pain for your own selfish desires! If everyone did that.... we'd be extinct as a species. No one has that right, even though a lot of people do it. Do you really want to lower yourself to that and know that you're just continuing a viscious cycle?

It wouldn't be fair of you to treat person A badly because person B treated you badly.

At the same time - life isn't fair. You aren't happy. You view this as exclusively being the fault of others - that isn't fair either. Other people may seem to have things easier than you, but others have things worse.

I honestly don't understand how people can be like that - taking their anger and resentment out on other people. Then again - I can't even fathom causing pain to the people who've caused ME a great deal of pain - I want them to be happy, even if they've hurt me. The thought of causing OTHERS the sort of pain I've felt?? That actually makes me feel sick.