Julian Assange might not feel free yet. I don't know him, I'm only speculating, but overwhelming trauma might make him feel like he's deeply damaged, not the same anymore, unable to see how he can ever move on. It may take time for him to see potential in his own future, and that's when the feeling of finally being free would really connect.
I don't mean potential to do more shit, I just mean potential to enjoy life and feel deeper trust again and stuff like that.