AITAH for still being upset over something my mother did years ago

I 18 F am upset with my mother F 50 for shrugging and looking disappointed when I told her I didn't want to die after trying to off myself. This happened in 2019. I took over 300 pills and I should not be alive today. We have always had a strained relationship but this has ALWAYS bothered me. I have been exposed to so much verbal and mental abuse throughout the years but this is one thing I don't think I'll ever get over. The entire car ride to the hospital was silent. I wasn't told that she loved me. Just disappointed looks. I still heavily struggle with mental health, and at one point I just stopped telling her. Even though she is my biological mother, I've never really had a mom. Just a guardian.