If you wish to find out what healthy polyamory relationship looks like you have to go see Tibetan culture. When younger brother brings a new wife to his house he first offer her to his beloved superiors, his father and brothers, and only after they are satisfied, his turn can come. And his new wife would first prostrate herself before his mother and his older wives with the words: "Hello, my Lady, I am your new servant, please use me and accept my unworthy service, be blessed and live forever!". This is called respect and family bond.
You see, most people answering are Western. They are raised that their ego is the most crucial thing for their survival rather than feeling part of something else. In Eastern culture such thing as "self" does not exist. Give your father and brother first and only then to yourself. In some cultures having several brothers of the same blood for husbands is totally normal: they would not attack each other because they feel as one. Not every culture and not every people is so insanely concentrated on individual ego. Some tribes has no such thing as individual ego at all: they feel not as "themselves" but rather as "a tribe" or "a family" or alike. I don't feel myself as "myself" though I live in very civilized part of my society. I feel their pain first and my - after. I always first let others take things and myself take only what is left from others. I don't mean those alien, I mean those of my family or group, co-workers, classmates etc. fellow people, people in same situation, of same profession, of same disease etc. This is also called "kin". We have very strong feeling of fellowship and very weak feeling of "self". This is how all civilized Russians act (this absolutely does not mess with our Racial values and is absolute proof that nationalism does not involve egocentrism). Though my country is monoamorous, this is not out of egocentrism, rather it comes naturally. I just tried to show the example of how polyandry might be nothing "wrong" if it naturally emerges from national mentality and is not a fruit of decadance or promiscuty.
Cuckoldry is not protecting your women and country from filth and letting filth rule the world. You can act like this being monoandrous as well. While 100% polyandrous Butan Kingdom does not have moslen migration, emasculation, whoredom and related.
I think it is incorrect to compare white people (Slavs: Russians, Belarusians, Ukrainians) with tibetans, who are usually asians, not white people.
In Russia, Belarus and Ukraine, I have not observed this in any white family, but what you describe really gives the impression of slavery.
If rely strictly on Slavic paganism, which I am very familiar with, since my own father was a pagan and his friends are also pagans and nationalists (some of whom unfortunately kill each other on both sides in the War in Ukraine), and I attended on many pagan holidays, in companies and saw everything from the inside, but what you describe I didn't see it and I don't think it's anywhere.
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