As an outside observer, I may not be qualified to comment, but based on the experiences of my parenting peers, two good quality parents are much more likely to be a suitable way to bring up children, especially if there is more than one.
I suspect that having two responsible parents, whatever the gender mix, is likely to be universally better than one, whatever the gender. Two parents share the load, and the load can be immense.
Bad parents are bad, no matter whether they're male, female or whatever they think they are.