But it does seem the fundamental dislike of Brooks’ approach is much higher than other vendors and I don’t know why?
He's technically a "vendor", certainly.
But not, I think it's fair to say, in the same category or style as others generally (quite correctly) labelled "vendors" in trading forums.
But to answer your question, I believe that in the case of Al Brooks, there are three main reasons for it (these three perhaps overlap to some extent, and there may also be some other, subsidiary reasons, as well) ...
1. For someone about whom trading forums are full of so many long-established, independent members stating openly that his work was
very valuable to them and they might not even be making a living at all without having studied it, his books are
particularly badly edited and pretty heavy going: that clearly causes some resentment, because they're clearly "not for everyone" and there are undeniably buyers of them around who didn't find what they were looking for there (whether those people were ever likely to with the books of other "equivalent authors" is another matter altogether and not relevant to the point I'm making here) ...
2. He's not selling or promoting or describing anything even
approaching a "ready-made system", by any stretch of the imagination, but rather something that really needs a great deal of hard work and study, and is therefore subject to some resentment from people who've bought his books really not quite appreciating that ...
3. He's a very highly educated, former professional guy with a notably successful career (as a professor and surgeon) and there really
are some people in trading forums (and elsewhere, doubtless) who have some residual, often unspoken, maybe even subconscious antipathy to such people ...
And actually another one, which I offer
almost tongue-in-cheek! ... 4. It may even be that the people "proclaiming" Al Brooks as a "good educator" in trading forums (and I naturally admit to being one of them, myself, of course), because of the kind of traders
we tend to be, have a way of posting which in itself can inadvertently provoke some resentment and hostility toward us, which may "thicken the plot" to some extent and result in more critical comment than would otherwise arise (actually, to be honest, the more I think about this possible reason, the more I feel there may be something in it!

).
Xela, would you be willing to share what you find most helpful, or provide a link where you have done so previously?
With many apologies, I find this terribly difficult to do, for a whole bunch of reasons, including the following ...
(i) It's really difficult to summarise because to some extent it's a "whole new way of looking at what's going on in the markets" (some people will dispute or even perhaps ridicule this assertion - and that's ok, too
);
(ii) I'm way too Aspergerish, myself, to be able to explain in a way that's likely to be helpful to others what I got out of it (especially as I originally approached it very much from my own perspective, having recently abandoned indicators and enthusiastically devoured almost the entire written output of Joe Ross, Bob Volman and Lance Beggs, and let me tell you that's a lot of "output");
(iii) Doing so would in any case kind of encroach on "details of my own trading" about which an NDA I've signed actually prohibits me, these days, from presenting any details in forums (this will also doubtless sound like a "feeble excuse" to some, who may even be quick to say so openly, but I'm afraid that doesn't change its reality from my own perspective
).
In summary, on this subject, I can't really add anything helpful to what I said in posts #6, #19 and #25 above (which in some ways I now regret having made, albeit that they probably only repeated things I'd already mentioned elsewhere in the forum). Sorry!