Hahahahahaha!
Well then, I would postulate that you got the feeling that bettering yourself will give you validation from the values you were taught as a kid, by your parents and/or society. But, why would they teach you these values? I believe it is because our forefathers went through trials and tribulations and had to compete with others in society to earn their way in life and so they saw the value in those experiences, even if they weren't always ones that made them feel good, in how it shaped their sense of right and wrong and worth. Teaching these values to the next generation is meant to give them a head start so that they don't have to take quite so many bumps and bruises to come to the same conclusion. Agema put it more eloquently than me though, but what he said is essentially how I feel on this.
I gotta say, I took a while to read this, cuz the moment I read "postulate" I decided I did not feel like being armchair psycho-analyzed.
I learned some value from my parents. I learned some from school. I have kept some and discarded others; if I hadn't made those choices, I'd be a blind Trump supporter, would think that the blacks needed to work like the rest of us instead of being out in the streets, and thinking that capitalism was the expression of natural human behavior. And also that all communists were genocidal authoritarians who wanted to return their countries to a form of feudalism with themselves as the aristocracy.
The difference was made not because I wanted to compete against my own heritage or any such nonsense as that. If anything, the beliefs of my childhood would afford me far greater moral certainty and a greater sense of worldly order than my hodgepodge of values now. I simply had educating myself on the world as an interest. And I have to say, having gone just a tiny bit on that path: this idea of "balancing" the "virtues" of competition with the "negatives" is hogwash. There are no virtues to either extrinsic or internal competition among human beings that are not bought with toxicity and the lessening of others, therefore there are no virtues, only winners and losers. The idea of competition being a necessary human trait only serves to justify class division, winners and losers. That goes for capitalism, for feudalism, for mercantilism, for most political and economical ordering systems you're likely to name.
I've already stated that research supports the idea that most human to human competition, in the form of wars and economic/political dominance, only began with the onset of agriculture, and how the value systems of the previous hunter gatherer tribes were fundamentally different. When you have nothing to conquer, there is little reason for competition. I hold the will to dominate fellow humans as inherently toxic, to one's values and spirituality, and I doubt my mind could be changed.
You do not seem to be distinguishing between struggle and competition. Our ancestors struggled. They learned from their struggles, or they didn't and perished or were impoverished. Only some of those struggles involved competition, and most of the notable competitions spilled rivers and oceans of blood, pain, and hurt. What I learned from those lessons: competition is a vice.