How to make a good creepypasta oc

Backstory

 THIS IS THE MOST IMPORTANT PART OF THE CHARACTER. In my opinion.

 I am SO tired of the cliche "bullied" and "abused" backstories. I know it can be hard to make a good backstory, trust me I know from experience. (*thinks of past horrible characters) AH!

 If you are going to make the backstory tragic, make it surrounded around them. Make it their fault or something like that. Or perhaps you could make it so that they were forced to start killing by something or someone. Think of a realistic situation that could make somebody snap or start killing. What would make you snap? Use that!

 Now, abuse can be turned into a better story than the bad ones it is known for. Don't make the parents abusive just because. Maybe they were in an abusive relationship and they got out of it so now they kill abusive partners. I like transforming something overused into something more creative. See what you can do.

 Also, make their killing have limits. If in their backstory there was children involved, make them not able to kill children. If it was that abusive partner story, make them not able to kill people in abusive relationships. They are not emotionless unless their disorder is not feeling emotions XD. They should still have a little bit of human left in them. 

 An example of a HORRIBLE backstory:

 Suzy was abused her whole life by her parents and bullied at school. She couldn't handle the pressure and one day went crazy and killed her family and left the house never to be seen again.

Reason why it is awful:

 -abuse without any apparent reason

-bullying without any apparent reason

-suddenly going insane

-killing parents

-not enough details

 Notice how similar to Jeff's story that was? WHY IS HE A BASE FOR EVERY BODY? I need to make a rant lol. If you have a good backstory idea leave it in a comment.