Single mum of two here. My eldest's DF lives overseas, my XH (youngest's DF) lives a five minute walk away. XH does absolutely sod all to co-parent, nor does he pay maintenance (in and out of work). I try to ignore the comments, or bat them back.
I've had comments about not working and living off taxpayers money: I've always worked FT, apart from when I was at university (I worked PT then!). Hell, I was the breadwinner when I was still married. One guy years back propositioned me, and when I politely turned him down, got shitty and threw that one at me. Stupid thing was that HE wasn't working and was on benefits!!
People have expressed surprise that I've got an education. Well yes, I've got two degrees, and I worked bloody hard for them. I didn't get to where I was without hard work.
I've had people being surprised that my children have good manners. That really pisses me off...it annoys me that some people will assume that single mums don't know how to bring up kids properly.
People have commented on why I'm not dating (I want to remain single - they can't get that). FWIW, I didn't plan on being single: I'd been with first ex for 3yrs and knew him for years before that. He walked when I was pregnant (I didn't predict that one). XH developed a drug/alcohol addiction after an RTA. I divorced him for that and for cheating on me. I certainly couldn't have predicted that issue either!!
Oh and I get the usual comments of having latchkey kids (they were/are in wraparound care)/"why have kids if you're not there for them?", or being a "working mum". One guy kindly pointed out that HIS wife was ALWAYS at home for their kids (he's on a six figure salary and they could afford it, which is great and works well for them). I pointed out that had I not been working, I'd probably be slagged off for having kids and being on benefits. I also pointed out that I have to work, as if I don't, I lose my registration, and my ability to support my family independently, because there is no one else that will support us as a family. Funny how he didn't comment about fathers who fuck off and don't equally co-parent their children.
I've figured that you can't bloody win, so the idiots who make the comments can GTF. If you work and support yourself, you're somehow lacking as a parent: if you stay home and are on benefits, you're also somehow doing something wrong. If you stay single, you're questioned. If you date, then people presume you're on the hunt for a man to pay your bills.