The only reason people have come to this uncharitable view of the Jedi Order is because George Lucas is not a good writer. Simple as that.
Sorry to cut out most of what you said, but that would be too long.
The Jedi have fallen from their high point and are now struggling and sacrifices have been made. Their teaching relies on avoidance rather than learning how to resist the dark side. Their missions have become more political - controlled by the Senate and Chancellor - than moral (going to help where they are needed). The Clone Wars are the final nail in their coffin because it emphasizes everything they are trapped into doing. And they get destroyed for it.
I don’t think it is the writing, at least not this part. I think this is all pretty clear. If there is nothing wrong with the Jedi, why do they need the Chosen One to come and balance things? We are left to imagine how the Jedi would have been before all this in their glory days. But the PT does not depict their glory days, it pictures them in decline and clinging to traditions and that is included in the films.
Please explain your distinction between avoidance and resistance. That just doesn’t make any sense. If you’re talking about temptation, avoidance is legitimately the best strategy FOR resistance. It’s better to prevent a situation or avoid getting into a situation than to intentionally put yourself near it and grit your teeth and focus really hard on not doing it. But the Jedi absolutely also teach how to do that if you’re in the situation. That’s the point. That’s why they’re always talking about clearing their minds, and meditating.
Sometimes the political missions are the moral missions. If they were sent out to free slaves, that would absolutely be a political mission as well. We don’t really know the details of what their missions look like anyway, or what most Jedi are up to outside of Coruscant. For all we know, they’re serving the people perfectly well.
The Chosen One isn’t to balance the Jedi, it’s to balance the Force, which in some way involves destroying the Sith. The idea is vague and not explained well, but at the very least it doesn’t say anything about getting rid of the Jedi or fixing them.
The PT does depict their glory days. According to Lucas, that was the point of Duel of the Fates being so different from the OT duels. They’re at the height of their abilities, so they’re doing all kinds of flips and whatsits and have faster choreography.