Hi Shannon, Thank you for your comments.
For him, It's been very difficult to communicate with his mom for a long time. So sometimes he feels sad, angry, frustrated, empathy about her when his mom has a serious quarrel with him, or she always likes to say bitter things to someone. But I think the mom aren't angry at nothing. She is just picky, stubborn and has a control freak in lots of things which are done by her rules and regulations.
Thank you!