It has been my observation that often people turn the villains into monsters with NO good qualities and the victims into angels with no rough edges or flaws. We know so little about the people in these cases that rhapsodizing about the victims seems to be seen as the only way to be "victim friendly".
Unfortunately, each human is a mixture of good and evil, of good decisions and mistakes.
Frankly, I deeply pity some of the judges who are required to rule in some of these custody cases where there is NO good option for the children. This is a case that has appeared to me to have no good options.