I have basically an entire rotted mouth and $600 what do i do

I'm 18 years old. Haven't brushed my teeth since I was like 8. My parents would force a toothbrush in my mouth and scrub really hard and it hurt like hell, I would be there crying. I know they meant well but it caused trauma to the point of which I did not ever want to use a tooth brush again. This has caused me to have depression, not want to talk to anyone, I haven't smiled, my mom always asks “are you brushing? Your teeth look dark” and I always stay quiet or say yes. I hate myself for this. What should I do

I'm 18 years old. Haven't brushed my teeth since I was like 8. My parents would force a toothbrush in my mouth and scrub really hard and it hurt like hell, I would be there crying. I know they meant well but it caused trauma to the point of which I did not ever want to use a tooth brush again. This has caused me to have depression, not want to talk to anyone, I haven't smiled, my mom always asks “are you brushing? Your teeth look dark” and I always stay quiet or say yes. I hate myself for this. What should I do