Women usually don't "decide to be single mother(s)". They usually end up in that situation either because their husband or partner dies or they have to leave the man because he becomes abusive- I assume you'd agree that no woman should have to stay in an abusive relationship "for the kids", that nothing is worse than children being raised in a house filled with violence- or due to the public assistance rules which limit assistance to single-parent families only- sometimes the only option is for the father to leave to they can get assistance or for the family to starve to death for the sake of keeping both parents in the home- btw, do you support changing the "single parent households only" rule? A country that insists two-parent families are sacred should be willing to subsidize their survival- so no, it's not as simple as the mother just deciding to raise her kids alone for the hell of it.

And if you got divorce and lost the custody hearing, that's not feminism's fault- it's solely on you. It's because the courts had valid reason to think you shouldn't get shared custody- I mention that because it sounds like you're an MRA extremist out of vengeance against your ex-wife or the court system.