I agree on that part, though I think yamauchi buring so many bridges (a lot of them for justifiable reasons though he was a bit trigger happy) allowed iwata and others to build what nintendo is nowadays.
and with sony, sony was and still is a fucking dick when it comes to corperate policy and relations. they offerd the partenership to nintendo (and later sega) trying to exploit them to hell and back, sega JP realized this early and told them to basically fuck off, but not before they snuck some tech from sega of america (and people wonder why the relations between sega's american and japanese branches are bad....)
square's move is somewhat justifyable but was still a major dick move, and honestly square was crapping itself untill enix basically took over.
nintendo never made up with squaresoft. it was always in good relations with enix from what I understand, and its enix that was the one taking control in the merger....
