Don't get me wrong, before I even get started, I would never condone a father walking out on a child. And most of the time I think it's disgusting that people can do that.. But the way my life is going at the minute.. I am slightly beginning to sympathise.. 
My DP has 16 month old DS from his previous relationship with EXgf. Now, me and DP have been together for a while and I was definitely not the OW. I am not kidding EXgf has made both mine and DP life a living hell to the point where there has been numbers changed because of harassment and house moves because of it all.. It's getting beyond the point where it's bearable.. She has said that if he gives up his parental responsibility so she can have DS to herself she will stop.. Therefore she is making it near enough impossible for DP to see his son, now DP would never give up on his son because he loves him more than life itself. But it doesn't make me wonder, AIBU to sympathise with fathers who do give up (only in situations like this, no other circumstance would I ever even consider it)
Probably gonna get a bit of a backlash but needed somewhere to rant as well as ask! 