my son will be 3 in two days.. i was getting frustrated like you , for a while. thinking i wasn't doing something right.
but after talking to my husband(who he will GO for), and also our pediatrician,, i came to the conclusion it was ok to let it rest for a while. if both of us(or even one of us) is getting frustrated, it's best to not force it.
aaahhh don't worry about what others are thinking. :-)
every one! had to learn to go to the bathroom when they were toddles. and he will catch on too;-)
you are not a quiter! you're reasonable..hahaha..
good luck...
was your 7 year old trained by now? was that one easier?
i think my son will be hard and my daughter will be easy..
T.