I need to vent here because I have no other place to vent without getting grounded by my slightly narcissistic mother

I have a mother who's 37 at the moment, but she is so immature and narcissistic! She always expects everyone to be perfect rule models, doing everything according to plan and when you do, she's happy, but you make 1 tiny mistake, all the respect and joy she had for you? GONE! I would be trying to find something for her which I wouldn't know where it was, but I can't do anything without pissing her off! I ask too much? Piss her off. I ask too little? Piss her off! I know I'm 16, but I don't know everything and It's not like my mom loves me enough to help me because I ask for help, 1 of 2 things happen; 1: she gets mad at you because you don't know something. 2: she redirects me to my grandpa, who's always very tired. I try to express my frustration in the nicest way to her, you know very calm and MATURITY, But she takes it like I just disrespected her, so she tries to ground me from my phone and games just to stay in control! I have no choice really but to just bottle my frustration up and somehow be expected not to burst out in a fury of rage.