Of course those forums will be filled with complaints. What else do you expect? I'm not on those forums because I have nothing I feel like complaining about to a bunch of strangers, I don't care to drag down my day by reading others' complaints, whether justified or not, especially since nothing I might say can possibly change the outcome for them, and I find I am much happier that way. Social media rarely makes things better.
SAs say encouraging things all the time - they are in sales, after all - but generally speaking they do not make promises, they do not decide who receives a bag and anything that sounds like a promise should be ignored. Surely we all know this by now?
JMO but this is really why it's so much better not to even think of the "other" things you buy at Hermès as "pre-spend" for a bag that no SA can ever promise you will be yours until the moment the box is opened in front of you.
It's been said countless times here, but truly, it is essential to only buy things you love and want or need. That is the best way to stop the cycle that
@OnlyModa rightly laments. That way you won't feel like you are trapped by the sunk cost if your dream bag doesn't eventuate because you'll still have things you love and would have bought anyway. You won't feel like you've been played in a game where the rules are set by someone else. And of course, we all know that you can buy any bag you want, BNIB on the resale market. You don't have to choose to shop in any particular way if it is not getting you the items you would like. You can't control what Hermès does, but you can control the choices that you make.
It's really so much better for your equanimity and emotional wellbeing if you can release yourself from a focus on pre-spend and just enjoy the shopping. The bags come - this is 100% my experience - when the relationship is not negotiated on a transactional basis. If you don't enjoy the shopping and the relationship (and I can certainly understand why based on your experience you seem not to be enjoying any part of it), take your business to another place where you do enjoy it and are welcomed as a valuable client.