I went through something similar. I made straight As through school and graduated at 16 but still had immediate relatives telling me I'm weird, won't be anything, that I'll drop out and be a pr0stitute, I'm stupid and only book smart, etc. But I started going to therapy and working hard on improving my relationship with the Creator and it drastically improved my relationship with the Creation. I learned in therapy that my family was projecting. I'm not all those bad things they said, they're only jealous and scared because they never made it as far as me and it terrifies them that I was never broken by their toxic and abusive displays of authority. Through Islam I learned forgiveness and empathy. I put myself in their shows and thought about how they also grew up in abusive households and didn't have access to an education like I worked for. I began to understand and forgave them.
Don't allow your mother to bring you down. Forgive her and love her still as she reared and weaned you. Know that she doesn't believe what she's saying and it's not true. She's just hurting in her own way and doesn't know how to heal. She's likely proud of you though her words say otherwise.