This doesn’t make any sense.
You’ve been complaining that the residential school system was not genocide because it did not constitute an attempt to physically exterminate a population. Alright, fine; that’s semantic quibbling but fair enough. Then there exists a term for that; “cultural genocide.”
But now you’re saying you… don’t buy that? You don’t buy a different term to describe the other phenomenon? Uhhhh, why? What’s wrong with it? If you object to the the fact it’s a compound term, are you not aware of how English works?
Would it make you happier if we just invented a new word? Until then, can we just use the terms everyone’s been using for 70-od years so we can get back to a discussion of the real issues?