Not at all unreasonable to feel sympathy.
It's not unusual for people who have had a very difficult time of it to become quite unlikable, sometimes for an extended period, sometimes for their entire life if they never find a way out. A combination of nature and deeply imperfect nurture can play havoc on character, personality and behavioural development.
During the worst of the aftermath, when I needed support the most, I repelled people because the symptoms of trauma left me so unlikable, such hard work and increasingly desperate to attract the sort of positive attention I needed, but doing it in a way that got me the negative attention I needed the least.
I was my own worst enemy and nobody could help me because I gave them every reason, and then some, to reverse sharply when in my vicinity.
I spiralled down for a good while before I started to crawl back up. But I don't blame the people who stepped back from me with alacrity. I was a lot to take on even in a superficial, fairly arms length relationship. I blame the people who provided the trauma. And myself, because I was so focused on my victimhood I managed to marinade myself in self-pity to the point of self-imprisonment in pain.
I feel for her. I see a lot of how I used to be in her. But I wouldn't want to be around her. Drowning people can grab hold and take others down with them. And she is looking more water logged by the hour.
In some ways I think she is at a distinct disadvantage by being famous and well off. In those circumstances there will always be leech like people who will hang on, praise all choices, justify all blabs and say "yes" like a pet nodding doggy. That has to make it so much harder to bring the spiral downwards to a halt, with the realisation that if so many people are coming to the same unhappy conclusions about you, maybe it's not them being "haters" etc. , maybe it's you and who you have become.
Without that acceptance of rejection and dismissal having a foundation of truth in how you present to world, which can act like a brake on the downhill slide, it is probably a million times harder to start the uphill slog to something better for yourself.