Because I have felt this way quite a few times just recently.
They always seem to behave for their dad, but not for me, and I feel I'm getting it all wrong.
Sunday evening I ended up in tears because I lost it with my 8 year old son, and we have had another falling out this evening. Although I remained quite calm earlier, as he was stropping behind me due to not being allowed a comic (this was because he didn't behave great on the walk to the garage), I felt far from calm inside, and still don't.
Do others have moments like this?
Not sure why I feel defeated & close to tears at times either, as I'm supposed to be the adult here, but it sometimes runs me right down.