I'm a single working parent.
Half the time if I say that, people say "oh yes I know how you feel, my husband works long hours/often works away from home/I'm a SAHM home with the kids all day..."
No you don't!
Any one of those scenarios may have its own challenges but it is NOT the same as being a completely lone parent with no input at all from the other parent. No maintenance, no visits, no contact. Shouldering the entire physical, practical, financial and emotional load for your child/ren is a unique thing in itself.
AIBU?!