The individual and authority
I am an egoist, and Max Stirner is a major influence on how I think about the individual and fixed ideas. I agree with Stirner on everything except his views on religion.
I am interested in the point where an idea stops being something a person uses and becomes something that claims authority over them. A rule does not justify itself by being old, popular, or described as sacred. It still has to be examined.
For me, self-interest is not automatically the same as immediate pleasure. Understanding what serves me can require patience, learning, and rejecting an impulse that feels good in the moment.
Human behaviour
I am a misanthrope largely because I see double standards as widespread. People can demand honesty, fairness, or loyalty from others while excusing the same behaviour in themselves or their own group. The principle changes depending on who benefits.
This overlaps with the idea of moral hypocrisy: presenting a moral standard while applying it selectively. Related concepts include motivated reasoning and in-group bias, though they describe different mechanisms.
My view is that this pattern is common enough to shape how I judge humanity. That is my judgement based on observation, not a claim that every person behaves this way.
What I have not settled
I am still working out how best to define self-interest, what would count as strong evidence about human behaviour, and how much any general view of humanity can survive exceptions. These are questions to investigate, not conclusions I have already solved.