I'm now caught up on Vivy and the plot holes have kind of spiraled out of control IMO. I'm surprised the rating hasn't tanked. We learn that the singularity project was just as dumb as it looked like it was and they all just missed the obvious.
They set out to change future events that would lead to the war between AIs and humans, but they never had any fucking clue why the AIs went berserk. All of the things they changed of course were completely pointless and had nothing to do with why the AIs went berserk and they never thought to check the literal system that controls all AIs software.
Additionally, at the end of episode 12 they just straight up cause a time paradox. By not saving Osamu in the 3rd timeline (for no fucking reason, they made it to toak with plenty of time in 2nd timeline) it means they didn't prevent Osamu from sending back Vivy's data which should shut her down immediately based on what we've already had explained to us but they just don't have that happen for no reason.
The AI mainframe also makes no sense at all. Vivy learning creativity would further prove what the mainframe was saying, not refute it. If AI can even create at the same level as humans, then humans would truly be obsolete.
The mainframe also had the ability to stop Vivy and more importantly matsumoto right from the start by targeting and killing osamu earlier which was before Vivy inspired the mainframe to give her a chance to sing.
Given what we now know, theres no way to save humanity without drastic alteration of the timeline so they might as well send back matsumoto and just have him show the government what happens if you make an AI calculate the future with the goal of improving humanity. He has video evidence and can easily prove he is from the future.
Why is beth better at combat than any of those random goons, in fact, why don't the random goons have a better combat routine than even Vivy if the mainframe has superior specs to matsumoto? Why don't they back up AI data in the first place? It's shown to be circuitry and you can download an exact replica of it as in beth's case. This makes the situation with kakitani's piano teacher dying ultra stupid cause they could just download his data into a new body.
Why a lot of things. When the story primarily focused on some mission, you could kind of ignore the overall plotholes, but now we are at the endgame and it's all about the plot but the plot is just so dumb. It's kind of triggering me to see so many people praise the plot in comments.
/rant
I'll probably rant again when the final episode airs tomorrow.