The fact that he did something wrong doesnt mean that he didnt try at all cause he felt entitled to score.
I disagree. While there are many other reasons for killing somebody, anger is usually a result when one feels entitled.
Anger comes when you feel you shouldn't have to try to hard to get what you want.
With zero entitlement, any frustration after coming up short will generally motivate one to keep trying until you succeed.
The anger is associated with a feeling of "this shouldn't be so hard."
Entitlement doesn't imply that anybody promised anybody, it frequently comes by believing nonsense marketing, fantasy TV shows, etc. Perhaps "entitled" isn't the best word.
But any time anybody tries anything and fails, getting angry at the "system" for "not being fair" is a response that only comes when one has unrealistic expectations.
Those unrealistic expectations have to come from somewhere.
They are also not simple to pinpoint in there origin.
But one component is any belief that "something should come automatically from any kind of effort."
Incels generally feel they are being treated unfairly.
"Involuntary" celibacy. They all have a feeling of "unfairness" of not getting what they think they should get, or what they want but don't want to have to work to get.
Essentially it's childish, as it is similar to an adolescent crying and expecting somebody else to come and fix things.
It's any kind of feeling that says "my problems are not my fault and not my responsibility. They are somebody else's fault."
This is why all the anger is directed OUTWARD. There is a belief the problems caused are EXTERNAL to them.