Look, I actually criticize Filoni very much, but this is one of those times in which I prefer his interpretation over Lucas’, not only because it’s much more compelling, but also because it works better with what’s shown on screen in the actual Prequel Trilogy.

We were told Vader was seduced to the dark side, not that he was a poor baby victim of bad Jedi teachings.

One thing doesn’t exclude the other. It can be both things at the same time, like 50/50. As I’ve said multiple times, the blame for Anakin’s fall shouldn’t be traced to just one person or a single group of people, but it can also be attributed to everyone at the same time, for different reasons. Everyone played a role.

We were also told the Jedi were in their prime before the Empire.

What Obi-Wan told to Luke could also be seen as a highly romanticized version of the events. I mean, of course Obi-Wan had to keep Luke fascinated and intrigued, so that he could eventually feel motivated enough as to embrace the Jedi path. In my opinion, to criticize stuff based on a literal interpretation of the Original Trilogy dialogue leads you nowhere. If everyone thought like this, then every Star Wars movie would suck except for Star Wars '77, because all the other movies more or less contradict some piece of dialogue from the original movie.