I don't think I really need to explain much, their admins are transphobic. 
https://hexbear.net/post/1587342
Snowe, an admin, complained about a transgender person being offended over being misgendered. Ategon made an apology post but keeps snowe on, no public apologies from snowe to the transgender people affected.
Textbook 
note: conversation about Ategon's use of the word triggered edited out, might be misunderstanding, need clarified
Something that takes months to years is not a particularly safe practice for marginalised people. It's really an either/or issue, either you're making a space safe for marginalised people, or you're providing protection to bigots.
Put another way - your benchmark for your "safe" environment to marginalised people becomes however many times you've decided it's ok for someone to harm a marginalised person until you ban them. What is the benchmark? Harming 1 marginalised person? 2? 3? How many marginalised people do you think is reasonable to get hurt and still call any given space safe for the marginalised?
I know you won't particularly like this framing, but it's a pretty fair way to frame it if you want to understand the perspective of those on the receiving end.