My parents fight all the time?

my parents always fight about EXTREMELY stupid things allllll the time. everyday they are at each other's throats (well, not literaly) about things that dont matter AT ALL. sometimes when my dad comes home from work, he will be in a bad mood and take it out on us, ESPECIALY me. hes alway yelling at me for stupid things. like really stupid things, like my shoelace being untied. and if my mom isnt right she will flip out and act like everyone is against her and fighting at her. so today, my mom was in a really pissy mood and she decided to take it out on my dad and i. so my dad is calmly saying no thats not true. my mom on the other hand is YELLING and flipping and shes like IM RIGHT AND I KNOW IM RIGHT AND YOU ARE WRONGGGGG!!! and she sound just like a little kid. so the get in a fight (not physical or anything) so i tried to tell them how they fight over stupid things and how it makes me feel. then my parents start LAUGHING at me and saying ok dr.phil!!!!