In that sort of set-up, who had the right to say something was significant and ought to be acted-upon if others out-voted them?
As an ex (of yesterday) Green Party member, there are some things that will be regulations / standing orders, e.g. informing the Party of anything that might bring a candidate into disrepute, and some things that will be a matter of democratic decision, and TerfBlocker would be an example of something that wouldn't be provided for in the Party's standing orders and so would be a matter for internal discussion. There are internal committees and processes to deal with disputes, so Caroline is right that she has no privileged rights in the process, although as people have pointed out on here, she could have raised the issue herself, but then she would have faced an outcry within the Party for going against a democratic decision, so she's going to face criticism whatever she does.
There are six members of national staff listed on the members website, I think there is some regional support too, maybe up to one person a region. Everything else is carried out by volunteers, mainly working part time (the young, woke ones may have nothing else to do, but most people have jobs and families). This clearly creates possibilities for things to slip through the net. It may be that the woke over-rode the better judgement of other Party officials, but it may just be someone busy / poorly trained etc. didn't recognise the importance. It may be that AC picked someone busy / poorly trained to tell, who knows.
None of this is an excuse for what has happened (which is why I resigned) but hopefully helps people to understand the situation within the Green Party a bit better.