How do I stop being jealous of my sister?

So my (f24) sister (f28) Jean has just completed her PHD, and is now receiving an incredible prestigious reward from her university for academic excellence. She is utterly brilliant and she worked incredibly hard, her dissertation was stated as one of the most impressive dissertations in that field of research in a long time.

I live with my husband and daughter, and work a minimum wage job. I've battled depression for a long time and deal with some PTSD from a rather traumatic event a few years ago. When I was in school I was bullied, and failed all my subjects, not even revising because I just assumed I'd have unalived myself by 25. I'm so so happy for my sister, but I'm so miserable at the same time, because it makes me feel even more like a failure.

I very much grew up in a family that prioritised academia. My grandfather worked in the mines when he was 14 and so taught himself to read and got a very good job. He pushed his children and my father to always value education, and so those beliefs were passed onto me and my sisters. Every single one of my sisters- I have 4- are academic. Ones a job centre agent, one an accountant, one a chartered surveyor, and now my sister (Jean) is a Dr. I work in a basic kitchen. My parents always pushed my sisters to pursue their interests and go to university, but when it came my turn, it was just 'do what makes you happy'. They had the lowest expectation of me and yet I couldn't even fulfil it because of my clinical depression.

This isn't to say that I don't enjoy and appreciate my life. I love my husband and daughter incredibly much, and realise I'm so so lucky to have them. I just wish I could shake the feeling of letting down my parents by not academically flourishing and the horrible feelings of envy over my sister who has done incredibly well for herself.

Any ideas?