Knowing what to avoid can be a large part of real esoteric development.
If Bardon is proposing someone spend many, many years studying his system in order to gain the powers claimed in the kabbalah book, when in fact no one achieves them in anything like the degree they are promised, then being aware of an indisputable critique is highly useful early on. And it is indisputable, no one can gainsay the two facts of his claims vs his own results.
Then again, most people lack the inner strength and inborn spiritual quality to not just follow along with what some book or teacher says is so. This circles back to some much deeper esoteric isssues.
I am not sure you noticed but I asked you some basic questions to help you on this. You have some mistakes here but before I can help you, I'd need to have those questions answered. You mentioned that no one achieves something but that is a false statement in it's nature, as you would have to be omnipotent to have that as fact to have the correct data, I've also achieved much of the book and working on further right now. Bardon's theory is solid and one of the best written versions of the universal way of understanding what it's like to explain God to others as well as outlines a functional path for your own experience that does work. Yes there are ways to improve upon it in this day and age thanks to the numerous teachers, and related shaktipat, transmissions and lessons they provide but one can achieve whats in his books. Most of what you're asking about though is achieved in his first book, not his third.
In the start of the post you mentioned, with some odd spellings, the result of Y-H-V outlined and that you were struggling to understand and achieve such a result. It's not hard, I've lived it and worked it, I use this in more than one way, now have I achieved the full value of that in permanence? For the most part yes but I have range to me. What I think you may need is to know that you can do this without Bardon, there is more than one way. So if you're already working with God on the great work and talking with God all the time, the ability to move the ruach is more than just this, it's much more like reaching AHYH and then developing the ability to move the ruach and that is something I am still cultivating to this day. Granted, I will hit another level in a few days, my skills will improve and I will have more revealed but now you know you can do it if you set yourself to it!
I personally supplement Bardon with Ophanim yoga to open the third book faster but if you haven't achieved most of book one, you won't have the comprehension, let alone the energetic skills and personally I find IIH + Ophanim/Christ yoga rotated with AYP/Kundalini Yoga and Qi Gong to really be where we get a huge amount before we attempt biblical level work with God.