I politely suggest that you check your anti-medication bias at the door. OP is describing a lifetime of feeling s/he is a failure and unable to achieve the goals he would otherwise set for themselves. This is classic ADD symptoms, and the only real therapy with lasting results is medication.
For ADD people such as myself, medication is life-altering in a positive way. I clearly divide my life before and after as different eras: before was a lifetime of failure measured against my own goals (not only external / work requirements), and after a still-ongoing period of self-empowerment and growth.
Yet people such as yourself would attempt to guilt trip and shame us from seeking the only thing which actually helps: modifying our brain chemistry. Why? What reason do you have for shutting down discussion of taking medicine to address a medical condition?