The Hammers suffered a 2-1 defeat to Burnley at Turf Moor on Saturday.
“I think nobody would have said anything if we would have got a point today,” the Italian told Sky Sports.
“I’m disappointed about the way we started, the first 20 minutes, other than that I was pleased and in the end, as I said, we could have got more that that.
“We should have been prepared better for them coming that way.”
New West Ham signing Ilan scored the only goal of the game for the Hammers.
Zola said: “I think he’s a good player and he came on and he looks alive. He’s got pace and his quality is very important.
He added: “It is an unexpected defeat and I honestly don’t like it but the (future) is going to be more difficult but we still have a lot of chances.
“Starting from Wednesday where we have a game where we need to perform very well.
“I think mostly our future is going to be decided at home because we have important matches there we can win.
“But also it will be important to pick up points away.”
