tbh. i feel like this has always been kendallās destiny. he has become, or is becoming, logan - like the show was always foreshadowing he would (youāre my number one boy and all that). the scene at the wake where he kept telling roman that heād āfucked itā was pure logan.
honestly i feel like the three central children will end up becoming the original roy children. kendall is logan, pushing everyone away, toxic relationships, will end up alone. shiv is ewan, tries to be more moralistic. will maybe move sideways into politics again or philanthropy. roman is rose, probably destined to not make old bones.
Kendall saying that everything he does is for his kids (who he barely ever sees) is also an echo of comments Logan has made in the past.
Shivās already planning her motherhood along the lines of Carolineās āminimal contactā model.
As has been alluded to in past episodes, and again in Ewanās eulogy, their Aunt and Uncle, in loco parentis, were harsh (if not abusive) people.
So I guess that, like most people, theyāre destined to turn into a version of their parents.
Plus, as a few people have mentioned, Jesse Armstrong tends towards circularity and repeated patterns/behaviours. Maybe this is why Connor has been most able to separate himself and achieve some semblance of contentment, because heās from a family model where ācompartmentalisationā was the coping strategy.