Evil and bad people usually have actual reasons for why they are doing bad things. They aren’t doing bad things just to do them — there is usually something bad that happened in their past, etc
This is the type of bullshit bullies say to try to make themselves feel like they are not so bad. If you are a bully, or ever were a bully, you were scum. Accept it.
There is no justification for treating people horrible. If you are having bad things happen to you, it says more about your character if you are able to stop yourself from treating people the same way. Break the cycle.