Buddhist explanation of self-worth/self-esteem?

I am currently doing some emotional work, and in the process, I am recognizing that I have low self-worth and self-esteem. So, I am wondering, what are the roots of this? I mean, this clearly exists as a phenomena but not necessarily as an elementary phenomena or ground truth. So, from a Buddhist perspective, what is this phenomena ultimately made up of? It immediately comes to my mind that it is related to things feeling dualities like inferiority-superiority, hatred-love, aversion-craving, and somehow it is also related to confidence. So, what are your views on it and how to improve it for a person who has low self-worth?