Vale have enjoyed a solid first season back in the third tier following their promotion from Sky Bet League Two last term. They were even in the hunt for a play-off place at the turn of the year, sat only two points adrift of sixth spot.
However, Vale's form has fallen away in 2014 and they have picked up only four points from their last seven games, leaving them closer to the relegation zone than the top six.
Grew insisted the Valiants have overachieved this season and cannot understand the criticism of the side.
"We are all disappointed, as staff and players we are all disappointed, but we are in a higher division," Grew told the club's official website. "What other club hasn't hit a blip. It is a bit annoying at times when I hear some of the comments.
"We never go into a game trying to lose a game of football. We knew maybe this blip would come some time during the season and it has come now which is disappointing because we were so close.
"It is not a crisis, it would be a crisis if we were in the bottom four, fighting to get out of it.
"People are making it out to be a crisis but if we win the next two home games we will be on nearly fifty points and safe, so where is the crisis?"