Sorry to be pedantic, but a ban cannot be voluntary, nor can a voluntary move be a ban. But I know what you mean, of course.
Leaving that aside, if you accept that a ban was inevitable, why do you think it was " a long way off", given what was happening in the EU?
What is your preferred plan - just sit and wait until the axe falls, with truly disastrous consequence for shooting? Or do the sensible thing and help to wean shooting off neurotoxic ammunition, so that we have a future? Or is the truth that most ardent lead-heads are old fogies who don't give a damn about the next generation for rather unfortunate, if obvious, reasons.
As for evidence, are you really a better scientist than the GWCT? A wise person changes his position when presented with a change of facts; what do you do?
On partners, every main shooting org took the same view. If you mean cartridge assemblers, they are supposed to meet market demand as it changes. If they don't they go bust. They need market demand to make non-tox ammo - as they are now doing in spades. I point you to the questions I asked of named directors of Gamebore about their 2018/9 accounts, filed at Companies House, where in the directors' statement they assured they had the legislative challenges to lead in hand and were at the forefront of developing non-toxic ammunition. Which should we take at face value, Gamebore's published accounts, or their joint letter of early 2020? The two communications seem to contradict each other.
As for representing members, if you really think you speak for more than a tiny band of obsessive BASC-bashers, why don't you have the courage to stand for election to BASC council, which makes policy? It's called leadership. If you don't like it, then don't join.
Or, if you are a member, you can vote the council members out - something you cannot do with any other org. Simply spending hour upon hour, day after day, bashing the only org than even bothers to post on here, seems like a sad waste of life to me. But hey, each to their own... I wouldn't ban anybody's little hobby.