The personality trait you're describing might be associated with a few different concepts. A strong hatred and distrust of anything outside of one's own interests could align with traits often found in narcissism, egocentrism, or even elements of antisocial personality disorder.
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Narcissism: This involves an excessive preoccupation with oneself and a lack of empathy for others. Individuals with narcissistic traits may prioritize their own interests to the detriment of others.
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Egocentrism: This is the inability to differentiate between self and others, often resulting in a focus solely on one's own needs and desires.
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Antisocial Personality Traits: These can involve a disregard for the feelings and rights of others, alongside a tendency toward manipulative or harmful behaviors.
If you're concerned about these traits in yourself or how they impact your interactions, it might be beneficial to speak with a mental health professional who can offer guidance and support.