Yes it's Sony's fault Square-Enix agreed to terms that Sony offered?
Does Microsoft think Sony held a gun to Square-Enix's head and forced them into the deal? Why does the 3P publisher's own involvement in these deals never seem to factor in? Oh yeah, because that would defeat the argument being made!
Virtually 90% of the games Sony have exclusivity deals on are either co-funded, co-developed, co-marketed or some combination of all three by Sony. Moreover, where's the addressing of Microsoft's culpability in having no impetus to make these deals themselves during the XBO's formative years? No one told them they couldn't make such deals, just like no one told them they HAD to cancel Scalebound, Phantom Dust remake, or HAD to close down multiple 1P studios.
And now some would argue Microsoft are attempting to overcorrect for their mistakes of the past. But among other mistakes being made, obfuscating their own involvement in those mistakes and misrepresenting Sony's positions in partnerships with 3P publishers into something that sounds a lot more villainous than it actually ever has been (and no different to things both Microsoft & Nintendo have done and continue to do).