Ryan Lowe was twice denied by the offside flag in the first half and again late on as the Dons failed to convert their dominance into a third straight win.
The Milton Keynes club are seven points adrift of a top-six spot with five matches left.
Robinson said: "I've got a lot of respect for Richie Barker and his team but I think we've pummelled them. We had so many chances and they weren't just half-chances, I'm talking gilt-edged chances.
"I'm absolutely shell-shocked, it's frustrating me because the players and the fans don't deserve that.
"We've got to be more clinical, we understand that, but the saves the keeper pulled off in the first half were world class. But Ryan's second goal was definitely onside, I've seen it again.
"I don't think the players can do any more apart from put the ball in the back of the net. It was the most dominant performance you are going to see anywhere up and down the country.
"It's win all-out on Tuesday against Swindon now. It's no-holds-barred, we've got to win all the games so at least we know where we are.
"We're far from out of it - if we perform like that from now until the end of the season I think we will win all our games and that will be enough."
- Sports & Recreation