the understanding to view ourselves as below humanity

Dehumanizing yourself doesn't help other peoples who are being dehumanized. Again, this is trying to mimic the conditions of the oppressed to assuage guilt, not helping them live in better conditions.

The west has a real problem with thinking itself special/uniquely talented/uniquely important/etc. Basically a huge ego problem on a system level as a side effect of the west being positioned as "better than" and its targets as "less than" in order to justify the exploitation and the killing and so on. Dismantling that does not mean reversing the polarity. For the westerner side of things, it means dismantling the systems of exploitation and coming back down to Earth; and yes, that includes when thinking of yourself as uniquely "evil" and needing punishment by association.

If you, personally, have committed terrible crimes, you should try to make amends for those crimes, especially with the people those crimes most directly impacted. If you think you're to blame by association for every crime the empire has committed because it happens to be where you were born, you're still thinking with the western ego. But you don't need to shoulder the blame for things out of your control in order to want to liberate oppressed peoples and to take action towards that goal.

i apologize if i come off as rude, i’m genuinely curious as to why properly loathing one’s existence as the entity is used to dissolve imperialism seems to be disliked

I don't see it as rude, I'm just telling you, it is not a helpful or healthy train of thought. Let me put it this way: If you think loathing the empire as an entity is inseparable from loathing yourself, that shows how much you still identify with the empire as a part of you. But why would you? Are you working for its military or something? Do you feel kinship with committing genocide? What is it about the imperial practices that you still feel connected to? Identify those and unlearn them. Learn from the east, from Socialist China and others like them. Learn from those who have succeeded in liberation. It's a good anti-ego exercise to learn from the very sort of people who the west normally condemns as lesser and they have a lot they do well that the west as a whole ignores, or refuses to learn from, due to its insistence they are "savages".