That puts the other person on the spot. Based on the tone, you can sound aggressive, accusing, ordering, dissatisfied, and at times attacking. “You have to ~~” “What are you~~” “Why did you …?” It can take a big toll on the person.
Anger is human’s most rudimentary way of saying “I am right!”
“You have not met my standard, and I am extremely unhappy about it”
Not sure? Think of the last time you got angry.