My Kid Sister in Life Lessons

Ok, this one is a lot, sorry it is scattered: My sister is 14 and I am 20. My parents let her do whatever she wants while i have to stick to their strict rules.For example: House work - I have a full time job while she is in high school - we both have the same amount of house chores. My dad says i don’t have enough and when i said i have a full time job, he said its not their fault.
I get yelled at for everything, while she can do what she wants when she wants. she hides in her room doing who knows what, while me and my boyfriend have to sit right under my parents noses or go somewhere and take another sibling for supervision.
My mom tracks my phone 24/7 meanwhile she hardly ever knows where my sister is. My sister is lazy, half does everything and my mom will finish, meanwhile i get yelled at if something i do isn’t up to their standards. They get in to my phone when they please - they pay for it so i cant stop them, while my sister has a pass code they don’t know.
She tells my parents she does not want to babysit my younger siblings, so they make me do it - whether i have plans or not. She is a complete brat and will not listen to me ever… she has a vehicle that she says is hers, while shes only 14, like the other day, my whole family was at my aunts house for dinner and i was going to leave to visit a friend for a couple hours and did’nt have my vehicle, my mom had hers there and my sister had drove my dad in “hers” so i told my dad i was leaving and he told me i needed to ask her permission first, and my mom said just don’t tell her so she wont throw a fit about it. Meanwhile a couple months ago, my dad let her drive my brand new truck that i am paying for without me knowing… and she is 14.
When i want to go with my boyfriend to see his family they make us take her too, then my mom blows my phone up all weekend and i if i don’t respond in 2 seconds she calls to chew me out, but my sister can ignore her all weekend and not get in trouble… they always take up for her and choose her side, and my mom always talks trash about me to everyone - tells them I’m lazy and never do anything productive. It really bothers me and i don’t know what to do.