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You might be surprised, Heroist, but there are far more people like that than you might think. Most of these (and other similar) thoughts were also in my head, and in the heads of many "locals" as well (this is just my assumption, so it might not be true). Well, people are indeed not equal from birth, and many things (perhaps even everything, if we assume that things like will and "character" are a product of mental predispositions and upbringing by family/environment/life events) are determined, as you said, by chance. What stats you rolled for yourself (health/abilities inherent from birth) and where you spawned (social class of the family, standard of living in the country, the society in which you grew up). Some may be born into a wealthy family, with good health and good looks, while others will be poor, sick, and ugly.
The only thing people are equal in is, perhaps, death. By the way, it's a funny thing – a person, no matter who he is, can die by being hit by a car/falling from a ladder/[insert your own], and ironically, that's also random.
Thus, life is worse than a computer game, because it has no programmed rules and, most importantly, not even a hint of the idea of "balance".
Of course, we all realize this, but it doesn't make it any less unpleasant. By the way, I don't find discussions on these topics disgusting or repulsive. Of course, someone will say that this is meaningless whining, and they will probably be right, but so what? I can be aware of and even admit all my inferiority as a person, I can complain about life as much as I want, but that won't make me think worse of myself, and I have no reason to despise myself (perhaps this is some form of higher egoism combined with objective self-esteem? I don't know).
Not so long ago, I had a similar (I won't judge how similar) situation with a person close to me, and a silent quarrel followed by a break in contact occurred, largely due to my quick temper, which I acquired due to daily irritation against the background of health problems (not to mention the lack of prospects in life, past scandals, etc.). And before that, I was a completely calm person. That is, even in this situation, one can say that life made me this way. On the other hand, one can, of course, say that I am simply looking for excuses for all my vices, but... Come on, that's not the case.
Anyway, Heroist, sorry for commenting on this message, but it won't make things worse. By the way, I like you, so don't think of yourself as a complete jerk.