My first reaction is that the problem is with you...
No argument here - I have had four Brooks and never a problem though, until this one. Could it be just harder than the others? Not that I can see. I went from my older bike to the new one, both with Brooks, and instantly had pain. But I thought that time and effort would break it in and it would pass, and now I have been out of the saddle for all this time I am not surprised to find a new saddle hurts - but I was horrified how MUCH it hurt.
My advice would be to put a different saddle on the bike...
Yes - and keep the Brooks and go back to it when I have hardened up the rear-end and hopefully I have got back to regular riding. So I guess I need to do saddle research - which I do not recall ever having done...