One of the best ways to heal this aspect of yourself is to actually expand the feelings of resentment in a safe therapeutic setting (possibly with a psychedelic or equivalent, i.e. Breathwork) and to get to the root of where your sense of survival was threatened by another's success.

This is quite common in the current us school system where children are routinely pitted against one another for the love of a proxy parent, aka teacher.

Yet plenty of people struggle with alcoholism and obesity.

I think you are dead on that about the similarity between these different things. But such temptations are not easy to overcome. Or at least just about everyone will have a weakeness for some such thing, and if yours happens to be resentment -- then it will be hard to get over.

But you rinsight is still valuable: if you have difficulty getting over something, then remind yourself that you are being a like a drunk.

Skipping the third beer is easy. Just jump straight into number four.