It works great for "normal" kids but for any kid even the slightest bit non-neurotypical, it's going to be absolute hell.
Society is not like this, family is not like this, even with your spouse, kids, or brothers/sisters you wont be like this.
Being criticized, ostracized by some, shunned by others, also helps make someone learn to socialize (which includes conforming to a few norms, that's part of being into a society instead of alone in the jungle).
And there are two other things too:
1) Everyone gets some of that treatment (even the popular jocks for example get talked about behind their backs as brainless or whatever). People that act like they are the only recipients, are too self-absorbed to see it.
2) Not everything someone brings or who their character is is good to begin with, just because its "theirs" or "original" etc. The group can have some pathologies itself, but it can help shape everyone to be better too.
Luckily for me, Girl Scouts was only somewhat bad one year. We moved, and then I hated the activities which focused around makeup and "girl stuff" instead of crafts and camping and things. My shunning was in school itself, and unfortunately the teachers didn't help at all.
Honestly a large amount of troops are maintained by mormons or others as extended wings of their belief systems.
AFAIK, Mormons recently voted to stop using Boy Scouts as their de facto youth activities organization. The looming crash in membership numbers as a consequence is partly what prompted the organization to go co-ed.
But that's fine, as it also takes a huge and heavy thumb off the conservative pan of the political balance of the national organization. Without them, BSA can now be more open to LGBT scouts and leaders. Maybe even atheists someday. But...
Each troop is shaped in some part by their individual charter and the relationship with the sponsoring organization. If a troop meets in a church, it is likely to be more religious than one that meets in an elementary school gymnasium, or other municipal-owned building.
It's not a monolithic organization. Each council is different, and each troop has a lot of autonomy to organize its own activities.
This leads to situations where every troop within a 100 mile radius of your kid might be a complete mismatch for them, but if you do happen to find one that fits, it will likely remain that way until they age out.
If you can't find a scout troop near you that isn't filled with personality clashes, your kid will likely want to move away when they get the chance anyway, because the scout troops reflect the local culture. They will encounter the same kids at the high schools.