Part of it lack of trust, part lack of professional NCO corps which leads to low ranked officers doing their jobs. Ukraine was slowly shifting to the western system before the war but the war didn't wait and such institutional culture changes can take decades.
Speaking of diversity, why is no one talking about Putin going full late stage Roman auxilia?
Should fighters meet the criteria, not only will they gain Russian citizenship, but their spouses, children, and parents will also be granted the same privilege.
fortune.com
Unfortunately for them, it's not even limited to cannon fodder:
Note that's from official Russian state media.
Visa-free agreements
with all African countries.
Those are levels of anti-racism unseen even in Canada and Schengen zone.