It's a pretty rough neighborhood on this side of the tracks. As far as his behavior towards you, most likely a bit of projection there, they seem to have to demonize us in order to justify their own actions and fuel their crazy train that's full steam ahead next stop happy-ville. I've been at that mediation table.... Twice... All the anxiety and stress that comes with it isn't fun, let alone the WTF feeling of "how did I end up here ??"
Advice... Imagine a blacktop parking lot, draw a big chalk white circle... Only allow yourself to be concerned with things that are within your control. Put those things in the circle... Do not give power nor energy to anything else outside your circle, keep your head high, do not budge from the things you need ( notice I did not say want) ... Hold firm and don't budge, you didn't ask for this nor does it define you.