It sometimes seems as if the primary purpose of the mainstream modern world is (when not inculcating fear) to cultivate resentment.
Resentment is, in my estimation one of the most evil of sins, because of its characteristic to grow - by feeding upon itself, by brooding upon grievances, by finding confirmation wherever it looks, and by stimulating others to behave in a way that apparently justified the resentment. Resenters are seldom popular with those they resent, so resentment tends to lead to grounds-for-resentment...
Well, let's just stop right there! Because in reality there are No grounds-for-resentment - and the idea that there are such grounds is a part of the sin-encouraging atmosphere of many social circumstances. For example, I have often heard it said that (given 'history') it is 'not surprising' or 'understandable' that - say - the Irish resent the English. Thus has soul-rotting resentment been celebrated and encouraged for generations*.
The fact is that resentment is evil - so there are never Any grounds for it; and we should not speak as if it were a natural response to maltreatment. Resentment may, like most other sins such as fear or lust, be 'inevitable' as an occurrence; but that does not make it Good.
This is because the primary harm of resentment is upon the soul of him who resents.
The conviction of 'justified' resentment is a major cause of unrepented sin; exactly because the resenter regards the person who (he believes) has damaged him as being 'to blame' for his own resentment.
We see all around us extreme examples of 'victim groups' who have fallen into a seething, growing, self-excusing and apparently permanent state of sin; because of their continual inflammation-of and brooding-upon their (real or imagined, it makes no difference) persecutions.
And, of course, much of the modern world is long-term dedicated to creating resentment-groups of self-styled victims.
This systematic and deliberate encouragement of sin is actually even worse than exhibiting the sin itself - since encouragement (by propaganda and other forms of persuasion, by financial reward, by manipulating social status through awards and publicity etc) is a more deliberate, chosen, and strategically self-seeking activity than simply falling into the trap of self-justifying resentment.
If one were to add-together all the (billions of?) people in the world who are either self-identified members of a resentment/ victim group; with those whose self-imposed task is to encourage resentment and the perception of victim status (in politics, civil administration, charities and NGOs, corporations, schools and colleges, the arts and academia, the police and military, religions, health services and so on...) - then we come to a very high proportion of the people in the world who are in a chronic state of self-righteous, hence unrepented, sin.
(Selling resentment is big business, nowadays - with many addicted consumers.)
And because it is unrepented sin that leads most people to choose damnation and to reject the gift of Jesus; I think we must conclude that the powers of darkness have been extremely successful in corrupting this world to the point that (apparently) so many will opt for Hell, and despise any Heaven that requires them to drop their resentment.
I would say that, in general, damnation requires moral inversion - that is, the reversal of values: such that evil is seen as Good and vice versa. Mass resentment is a core example of value inversion. As is the fact that modern morality - and to such a high degree - is rooted-in the conviction that the sin of resentment is actually a virtue, and indeed defines virtue. To be a member of a victim group defined by active resentment is currently regarded as an actual moral plus!
The antidote to resentment is gratitude. First gratitude to God for creation and sustaining, and for loving us as a parent. Second gratitude to those who love us... usually people from our family, in the first place - but also true friends, if we have any.
But in general a life dominated by gratitude - properly directed - should be our ideal; repented when we fall short.
Gratitude (once established) also has the property of feeding-upon-itself, and finding grounds for more gratitude. So, while we are all sinners and will all lapse - we can always repent our resentments, and affirm our gratitudes - and that will suffice for Jesus Christ!
Because it is our great good fortune that He does not ask us for perfection in thought, word or deed; but only to acknowledge that which is Good - and that which is evil. And that is our third (and consummating) major cause for gratitude!
*Note: I am 1/4 Irish.