She didn't lop off his finger, he did. He lied on the stand. Under oath in deposition he admitted he lopped it off. The marriage counselor confirmed he cut his own finger off.
No charges were filed, they were dropped immediately when the arresting officer discovered the 3rd party complaintant lied about witnessing Heard strike her girlfriend as a homophobic attack. Heard's girlfriend never said she hit her.
You're proving the author's point because you so willingly believe Depp's rebranding and her branding as a monster in spite of facts and evidence to the contrary.
Neither one of them are hero or monster. They are both deeply flawed individuals who brought out the worst in each other. They should never have been romantically involved as neither one was in a place to be able to cope with, help, or support the trauma condition of the other.
Grow up.