Need thoughts on parent-child relationship issues

A teenager acts like a teenager. They disrespect their parents occasionally but still love them. A parent gets sick of their child's behavior and punishes them, bringing the teen emotional distress resulting in cutting and drinking................. I really need some opinions on the situation, if I need to further elaborate on the situation ask. Any kind of response will help

When a person self harms it can be for a number of different reasons; a cry for help, a way of transferring anger or hurt into something easier to deal with. Your child is obviously very unhappy at the moment and the most important thing is to let them know that although you've been finding their behavior difficult to deal with, you still love them no matter what. It is important for them to know that they are wanted and that you will be there to support them. However, that if the cutting and drinking doesn't stop that they receive professional help before it develops into something more serious.

Maybe your teenager feels like you dont give them enough attention or may feel that you dont love them enough. Or it could even be other reasons. From my own experience, dont give up on your child. Ask everyday how their day was, take interests in their hobbies or pass times or even let them go to that party you said no to. Give them some trust & freedom, let them know you are always there to support & help them. Can i suggest not punishing them but telling them how upset or disappointed you are in them? Treat them like an adult & see how it works out. Maybe their behaviour may change.