Ashley Vincent put the U's in front, only for Tope Obadeyi to secure a point for the in-form Robins.
Former Watford boss Boothroyd has picked up two points from his first two games in charge and is encouraged by what he has seen from his players so far.
"We're resilient, we've become difficult to beat and Swindon are a good side. We could have nicked it at the end but football is not always fair, is it?" said Boothroyd.
He added: "I can't be too harsh on them, but in a couple of weeks I will be."