Personally, I always thought the Jedi Order and their teachings were flawed. The majority of the films reflect that. Not sure how they act in other non-movie material, but they were pretty neglectful most of the time. They didn't really seem to value emotion or attachment, which is fine...just not particularly effective. I mean, Luke and Anakin were constantly at odds with them. Anakin fell to the Dark Side partly because he lost faith in the Jedi Order after years of disappointment and neglect. Luke was only able to redeem Darth Vader because he rejected Obi-Wan and Yoda's council. To be fair, though, the movies are pretty inconsistent when it comes to what exactly leads to the Dark Side, as well as what constitutes as "dark".