Egoism And Self Esteem In Ayn Rand's Anthem

Have you ever wondered what the fine line between egoism and self esteem is? What is the meaning of egoism? What makes you an egoist? How can someone be an egoist. I think that Prometheus is a perfect example of an egoist because he only cares about his happiness, he is miserable working for others, and because he thinks he owes nothing to everybody.
“Egoism states that each man’s primary moral obligation is to achieve his own welfare, well-being, or self-interest…He should be ‘selfish’ in the sense of being the beneficiary of his own moral actions.” (Glossary of Definitions by Ayn Rand, pg. 12) In the book everything Prometheus does benefit him to reach his welfare in Happiness. On page 95 of Anthem Equality writes “For I know what happiness is possible to me on earth. And my happiness needs no higher aim to vindicate it. My happiness is not the means to any end. It is the end. It is its own goal. It is its own purpose.” In the final chapters of Anthem Prometheus thinks that the goal of any individual is to make oneself happy. There is many more purposes in life than that.
After all the years of working to help his brothers Prometheus never felt true happiness until he only helped himself. Prometheus is only happy when he is living for himself. Anything that helps him benefit himself

By the end of the book Prometheus writes in his journal "I owe nothing to my brothers, nor do I gather debts from them". That statement is not true. Prometheus owes his brother International 4-8818 because he kept the tunnel a secret even though he could get killed for it. I think that Prometheus is only planning on saving the chosen ones to benefit his plans and his happiness. He wants to build a his own society with him as leader. He wants to overthrow collectivism. Prometheus wants to gain more knowledge to gain more power. If that is not being something an egoist would do then I don’t know what