TL;DR

The definition of the word "ressentiment" from a well-known internet encyclopaedia.

Body

Ressentiment is the French translation of the English word resentment, from Latin intensive prefix re-, and sentir "to feel".

(...) ressentiment is a sense of hostility directed at that which one identifies as the cause of one's frustration, that is, an assignment of blame for one's frustration. The sense of weakness or inferiority and perhaps jealousy in the face of the "cause" generates a rejecting/justifying value system, or morality, which attacks or denies the perceived source of one's frustration.

This value system is then used as a means of justifying one's own weaknesses by identifying the source of envy as objectively inferior, serving as a defense mechanism that prevents the resentful individual from addressing and overcoming their insecurities and flaws.

The ego creates an enemy in order to insulate itself from culpability.

Lessons learned

Haters gonna hate, but some of them make up the whole morality and belief system to justify their weakness.

MGTOW/LTR/follow Christ/follow JP/... as much as you want, only make sure - for your own sake - that you have all your shit in order and this is your real choice and not a ressentiment - making up morality fuelled by superiority complex ego shit in your head in order to feel better about oneself.