I am going to imply that someone has disappointed (not discouraged) someone else by their actions. How should I convey this message properly and idiomatically in everyday speech?
I want you to study more. I've asked you many times to study. We're short on cash these days. I have no job. I sent you off to school to find yourself and makeup all these problems one day when I'm not able to manage the affairs. To stand in your feet and hold your own. Instead, you stay out till late night every day and don't pay any attention to me. You're disappointing me by your actions. (Said a mother to her son.) [Self-made monologue.]
I was wondering whether the sentence "you're disappointing me by your actions" is an idiomatically natural phrasing in this sense or I have to change it to make sense.
The problem is that when I google the sentence, I cannot hit even one single result. Perhaps native speakers phrase it differently or they use different verb here.