The 52-year-old coach is unable to hide his disappointment after watching the Serie A giants strike the woodwork twice in an unfortunate 2-1 defeat at San Siro on Sunday
The Italian giants created numerous chances at San Siro but failed to net a second goal after Mauro Icardi's first-half equaliser and eventually ended up empty-handed following Giacomo Bonaventura's 90th-minute strike just moments after Rodrigo Palacio had struck the post.
"We've hit the woodwork so many times this year. It's the kind of season this is," Mazzarri told the press after the game.
"Atalanta did well to score but we gave it away. It would have been enough to just mark Bonaventura and we wouldn't have lost.
"But, even if we had taken just a single point, you still can't start a second half that way with so many wasted chances."
After the defeat, Inter sit fifth in the Serie A table with 47 points from 29 games.