How should i tell my parents that i hate homeschooling?

k i have homeschooled since the 5th grade. i was in a cristian school till 4th grade. ever since my parents put me into homeschooling my grades have fallen. i absalutly hate homeschooling, i want to go to public school,but my parents say its not an option, how should i tell them? i have told my parents & other peaple that homeschooling really sucks. but im now stuck in 9th grade for about 3 years now & my parents dont give a rip they say just keep @ it, yet i never get any of the answers right. so someone pleaze tell me how i can convince my parents that i hate homeschooling, btw i have done the math, if my parents split or 1 of them dies i can go to public school. but i dont have the nerve to kill eather parent of mine & i hate both of my parents so plz some1 help me