This is a lot of words to say “I’m angry and I want to blame a hardworking creative studio, instead of the massive, famously consumer unfriendly, publisher that’s actually at fault”.
Does the game on Steam deserve the downvotes? Yes. 100%. The game on Steam is a direct result of the developers work and Sony’s publishing. But it’s not the developer’s work that is causing problems, but Sony’s publishing decisions that have negatively impacted the experience for huge numbers of people.
So does the developer Arrowhead deserve blame for accepting a contract to produce a game for Sony’s IP? No, they did that and did their jobs as contracted. Sony is the only party here that deserves blame for enforcing an asinine account policy that they’re competitors (i.e. Microsoft), do not.