be hard on
To treat someone strictly or with severe reproach. I know I didn't do well on the exam, but I didn't expect my dad to be so hard on me about it—he grounded me for a month!
be hard on (one)
1. To treat one overly strictly or harshly. Please don't be hard on Tessa—she's such a sensitive kid.
2. To be unfair or difficult for one to endure. It's hard on me to watch you suffer like this.