If you think CM2 was about as good as CM1, or AM3 was bout as good as AM2, thw conclusions you’re going to come to are just going to be absurd. You’re entitled to whatever personal opinion on them you want but that is objectively not what the GA thinks about their quality, not even close to close to close.
You will observe a change in outcome, and reason (falsely) that it wasn’t caused by a difference in movies so must be down to change in environment. But that’s totally fallacious. There was a huge change in movies that drove the change in outcome you just can’t notice it — luckily we have lots of data on aggregate reception, so you can use that to figure out what’s going on if you’re willing to let your personal interpretations not cloud the reasoning.