However, when considering valid reasons for complaint, the main issue causing controversy seems the fact that it’s a Sony account, with plenty of comments and review bombing the game for reasons such as “I’m not making a Sony account!” rather than focusing on more sensible reasons like the sudden change or the effect it would have on part of the player base due to regional availability.
I think the core issue in this comment chain is explained here: you perceive the complaints to be only about the account requirement, while they’re mostly about the combination of the account requirement under the delayed implementation. Unless people explicitly say “I’m only angry about the account requirement, not the delayed implementation” you have to assume any complaints to be in this context, because people usually don’t repeat the whole context of whatever current thing everyone is talking about, especially while angry.