"We gave two dreadful goals away from our point of view," he told Sky Sports News. "They have created some very good chances and our goalkeeper has kept us in the game.
"That is what disappoints me, that Manchester City's goals were given, rather than earned, and in the end we paid the price for that.
"We gave a spirited fight-back when we got to 2-1. We showed what we could do for a period of time and made Manchester City's defence look shaky. But, unfortunately, it was far too late."
West Ham are currently 14th in the league table.