well
From what i have learned on here, one of the MAJOR indicators of an unfit parent is when one parent tries to get the OTHER parent declared unfit.
what happens is Parent A starts a vendetta against Parent B; this facilitates Parent B feeling justified in retaliating against Parent A with THEIR vendetta.
then both parents have the option of bad mouthing each other, to their family, to their friends, to perfect strangers, making ugly claims and accusations. the bad mouthing usually leads to doing countless hours of research and documentation of every time the other parents belches and doesn't say 'excuse me', as well as tracking every moment of time spent with or devoted to (or not) the baby while simultaneously demanding that copious amounts of money be either being recieved by or having to be sent to which ever parent has custody.
Then they ensure that the baby they both claim to love and want the best for, is exposed to the anger and villification of the other parent, thus pretty well making sure said baby's self-concept is skewed, possibly from before the birth of the child.
Trying to declare a parent unfit pretty much sets the stage for parental alienation and such (which you can google) and is frowned upon by the courts.
it's an ugly, horrible, destructive hobby that a LOT of parents are invested in.
it's not recommended or supported on this site.