Sloth can lead to many of the others, it is like a breeding ground for them.

Lust has to do with the utilitarian aspects of sex and viewing others as objects and putting the "thinking" of our genitals on par with what should be our higher faculties, even when in love with each other. It is like greed. I do not see a way around experiencing lust on some level, but I can accept that a disordered view of the world, being in a world that has fully embraced many disordered things for longer than any civilization has been around (ie the fall of man and original sin and all that), makes it almost as difficult not be tempted by lust as it is to eat without tasting. Lust is also why there are some friends you might want to keep away from your sister, or why your friends keep you away from their sisters, or why women are uncomfortable around creeps. It extends far beyond just being, as Van Halen sang, hot for teacher.

Gluttony I think is a disordered view of pleasures, not just food. I like the taste of cheese cake, but I can't imagine having one bite, enjoying it sufficiently and being done. But, if I really savor that one bite and do not swallow it very quickly, maybe I could? I think it is like not putting pleasures (which I think these all would be "carnal" pleasures in the generic sense where carnal was not just about sex) in their proper perspective.

I don't see envy just as circumstantial greed. I particularly do not like envy because I see it as lacking imagination. Someone has something. So what? Why is that what anyone is thinking about. If I want something, I should strive for it. If someone else has something I should be happy for them if it is good. To see someone else having something and then saying "I want that" seems sad on two levels maybe. But there are a few bad assumptions involved in it. Why assume the person is befitting from having the thing? Maybe, but maybe not. Why does the envious person assume the benefit presumed to be gained from the thing would be one the envious person can gain. Also, do any minuses ever exist in an envious view of things? Like, should I envy a really nice samurai sword? No. I don't know how to use one. It would be a waste. Envy some other guy's girlfriend? Like how many ways can that go wrong? Also, there are other women. I don't think anyone characterizes it this way, but I really find envy to be so lacking in imagination that it --- might not be the worst but --- is maybe the figuratively worst one for being so pathetic.

Wrath might be a sin because vengeance is mine saith the Lord. It's not if they deserve it or not, but who gets to dish it out. But if we want to be wrathful we might be seen by God to say "I'm OK with you being wrathful to me God". That's why the prayer goes "forgive us our sins as we forgive those who trespass against us" and Our Lady of Cuapa tells us to make peace but not to pray for peace without making it ourselves first. https://saidit.net/s/Hail_Mary/comments/8v4i/our_lady_of_cuapa/

I have wanted to do a deep dive into the vices and the virtues. I think it is somewhat incomplete, or perhaps less fully functional or useful, to look at the sins without also looking at passions, vices, and virtues. A lot of the "patristic" fathers wrote about the passions, the distractions and feelings that come over us seemingly from with in. Even when it seems to come from "without", like when the guys from Van Halen are looking at the teacher they get hot for, it is from within and "passively" takes over their thoughts. So, the passions are tied to the vices which are tied to the sins in very practical ways. But, the passions can also be redirected, and the passions are considered by these early church fathers to be disordered virtuous things (this ties it all back to the fall and original sin). One (Saint Maximus the Confessor I believe) said Vices start where virtues are blocked. Not, like forgotten or anything but blocked. So, when we have someone who is denied a pursuit of a virtue or of a virtuous activity, then vices can flourish. Envy, as pathetic as I find it, can easily (even legitimately) be seen as coming from this kind of thing.