I think the Jedi are seen as flawed in PT because we want to blame them for Anakin’s fall, that they have a hand in his exasperation that led to his transformation into Lord Vader. The problem is Anakin knew he was joining a monastic military order, and that they follow strict codes of conduct, behavior, and life. Qui-Gon warned Anakin, “To be a Jedi is a hard life.” Anakin sis not “weight the cost.” He could have left at any time rather than backstab and take out his angst, and anger on his friends.