I don't really know what to do

I'm a m15, my mom is single and i live with my aunt and grandma. The thing is, I was born as an accident (my mom got pregnant as a teen) which caused my mom to stop her education. The issue is, I go home late quite often and when I do that or make little mistakes my grandma always says to me that I shouldn't have existed and their lives would be so much better if it wasn't for me. Those words hurt me, deeply. At first it felt like nothing, but rn it's really building up and catching up to me, I always do my best in my academics and perform quite well, yet they still say those things to me even when I do the most little mistakes. I'm not really the closest to my family either, earlier I cried to them about this and they just said that I should've just listened to them. I don't really know what to do now, I'm slowly getting thoughts of me ending it all. this is kind off a hard post since I don't really talk about what I feel often. I don't really have a close friend to talk about this.