Everyone's got frustrated at their baby at some point, it's normal, they are very demanding, don't sleep when they should and never say thanks, it's like having an extra dh!
The perfect mummy's would have been serene after and then made fresh bread for the morning (can't have perfect baby eating shop bread!!) scrubbed all the house and done the washing before pumping 15 pints of milk and doing crafts.
Me, I tell him to go the fuck to sleep, then return to the sofa to eat half a cheesecake with dh and watch a tv programme about sex robots, after climbing over mountains of washing and not daring to look at the kitchen.