Given the state of their mental health, I'm not sure that this sudden isolation will be a good thing. But it's entirely self-inflicted.
If, as seems likely, AC is a mentally fragile abuse victim, then "self-inflicted" is something of a harsh judgement, no? Suicides and self-harm are by definition "self inflicted", but most people manage to be sympathetic to the reasons behind them and accept that they are very rarely a rational or willed response. If you strip away the reluctance that the woke have to regard certain people as displaying frank signs of deep emotional and mental trauma, AC clearly shows frank signs of deep emotional and mental trauma.
Yes, their behaviour has been utterly disgraceful, taken at face value. But you don't have to be a woke TRA to sympathise with the child of a paedophile who is quite likely to have been victim of or witness to abuse, who has been in and out of care and whose mother is quite clearly (at best) unable to provide much support, who at twenty is having what amounts to a breakdown in public that has probably been brewing for some time. A lot of people who could have helped - the Greens, in particular - instead willed on someone who they thought helped their "cause" without any concern for the person they were using.
To assume AC had complete agency in their behaviour seems a reach. We can condemn absolutely much of what they and their allies have been saying and doing without regarding their destruction - because that's what this saga amounts to - as self-inflicted. When the dust settles, AC will likely be seen as another of her father's victims.