There is one thing that I cannot understand though - how can Sarah ever be construed as a 'people-pleaser'? To me, she has inflicted unquantifiable hurt on people who have been very good to her,
I think we talk different things here: you're right, Sarah has been careless or heartless enough to really hurt a lot of people, including her "nearest and dearest". But that's not the point: someone "addicted to please people" is not interested in long term relationships but loves/needs the short term "kick" of seeing someone smile and be happy because of something you've done. It's like starting your own kind of self-reward through getting good vibes from other people. People who don't interest you at all apart from the fact that they can give you those kicks. That includes (unfortunately) all kind of sales people....My, are the shop assistants happy when you spend, spend, spend...
The point is: it's short-term and does not need real efforts but buying gifts, treating people to a nice dinner etc. It's all fairly easy to achieve because you can buy this kind of short-term injection of good feelings - if you have the money. In return people thus treated pamper you a bit (staff), or react friendly (acquaintances) which gives you the feeling that your life has meaning, value and that you are loved. Which is, when all is said and done, just a cheap, superficial way to live without the need to really give something of value from yourself to others. As long as Sarah doesn't realise how this short-term good vibes system must lead to emotional crashes because nobody but your inner self can make you happy it will happen again and again. Maybe she will come to the point where she realises that in her "journey" through the Oprah-TV-Maze of consultants.
After the marriage, I am afraid that Sarah soon started to 'show the cloven hoof', as she began to peddle interviews and photostories for £ etc. This was the point that the tabloids turned from praising Sarah to criticising her - but there is a very interesting point here even about Sarah's abilities to 'keep quiet'.
I believe as well that this was the starting point of all Sarah's unlucky fate. You don't sell access to your insider knowledge and then lie. The media does not like that going against the basic rules of the coexistence of media and celebrity (especially not from a Royal), they start to see someone as a liability and search other ways to make money out of a person's celeb status. As happened to Sarh. And she must have offended people of the Royal Staff, otherwise these paparazzi pics would never have existed. Someone must have tipped the media off. And seeing how she involved the small granddaughters of HM in her adulterous lifestyle, I personally don't wonder that some "trusted" servant seems to have become a traitor in order to stop this.