The San Siro side remains without a victory, but the Dutchman felt his team showed significant improvement from the loss at Chievo last weekend.
Inter coach Frank de Boer claimed his side deserved to take three points from the 1-1 home draw with Palermo on Sunday.
The Sicilian side has never beaten Inter at San Siro in Serie A and had conceded 22 goals in the previous seven matches away to the Nerazzurri in all competitions, but was on track to end that miserable run when Andrea Rispoli's deflected effort gave the club the lead early in the second half.