People who go put of their way to hurt other people, even after they're nomlinfer together (!) are damaged, sad, angry, sadistic and ultimately unhappy individuals. Just be ultra thankful you've gotten rid of him (a sponger to boot, that must make him feel.so low too - couldn't even support himself) .. as for your new bloke, all you can do is take your time getting to know him. And nobody is perfect, and men all have different tastes; one if the most successful girls I've ever seen with men was fairly flat cheated, with a definire pear shape. She recruiter more blokes than the three armed services combined, and generally did the dumping too.
If he claimed you're loose from kids, that's par for the course, standard, clichéd bullshit thrown at women who've had kids. It's really hard to prove either way .. so they love it as the ultimate insult (apparent) to.hurt women and make them feel insecure. Problem with their little attempt is that there are literally billions of guys having sex with, in relationships with women who've had kids (and not just staying with them, but often choosing them over women who haven't) so it doesn't add up.
Tell him maybe it's just that his dicks too small, you don't have any problem with your new man who's hung better 
.
Or better still, just change your email, tell people who need to know and forget all.about the pathetic, abusive, sad ass little sponger.