County did pull one goal back through Liam Bridcutt in a game packed with chances, but Vale were full value for their victory.
Ablett said: "Our attitude was poor and we got what we deserved, which was nothing. We can talk about the first 13 minutes, but I don't think we performed for the full 90 minutes.
"I praise the boys when they play well, but I reserve the right to criticise them when they don't. I've already let them know in no uncertain terms.
"This is an important competition which gives clubs like us the chance to make money and get to Wembley. I'm very disappointed to be out of it."