Why are some scholastic players so disrespectful?

I was playing with someone who was possibly a third grader, who was 700 and I was 450

My opponent was saying out loud what options were there, how much better her position was than mine (I had all pieces developed though and she had only 2 on the back rank) and kept telling me to hurry up because I took 5 mins thinking about one move. She also said “Do you resign yet?” and “You know you play worse than you dress”

I know this is lacking good manners but I didn’t report it to the arbiter

This happened at least 2 times in my “career”

Edit: I am trying to study efficiently so I get better and try not to do that mistake again