Another one, paraphrased from multiple correspondents:
is it just me or are all the POs getting increasingly grouchy and unhelpful?
I am not certain, since I hardly have a representative sample. But I'd say no, this is probably just a bad run for you.
When encouraging you to interact with your Program Officer(s) I tend to emphasize the useful interactions that I have experienced. Consequently I may fail to convey that most of the time they are going to be unhelpful and even discouraging.
Try to see it from their position. They hear from dozens of us, all complaining about some dirty review deed that was done to our application and looking for help. Round after round, after round.
They cannot help everyone.
So take it in stride, as best you can, when you get a seemingly dismissive response. This same PO may become your best advocate on the next one*.
*and then treat you like effluvium again after that. It's happpened to me, I can tell you.