No, Deadpool's story isn't typically described as a straightforward love story. It's more of a wild and action-packed adventure with elements of romance mixed in.
There was a young girl alone at home. Knock knock knock. She went to the door but no one was there. Again, knock knock knock. She peeked through the window and saw a shadowy figure. This time when the knock came, the door slowly creaked open. She screamed as a pair of cold hands reached for her.
Hard to say. Sometimes stories like 'Knock Knock' blend elements of truth and imagination. Maybe it has some roots in reality, but could also be largely made up for entertainment.
One possible reason could be that she is angry with the person holding the food. Maybe they had an argument before and she wants to show her displeasure in a rather aggressive way.
Well, without more context, it's hard to say exactly who she is. She could be a rival of the person. For instance, in a workplace cafeteria, if there is a promotion at stake and the food somehow represents success or a reward, she might be a coworker who wants to undermine the other person.