Mariners find themselves last on the table after four games and succumbed to a 4-1 loss away to Melbourne Victory last night.
McCormack is currently experiencing his second spell in the A-League on loan from Aston Villa, after spending half of last season with Melbourne City.
The 32-year-old insists he's happy enough with the standard of service he's getting from his teammates and reckons they have the quality to hurt teams this season.
“There’s no frustration from me personally, I’m just happy to be here,” the Scotsman told FTBL.
“The situation I’ve come from is night and day for me. It’s frustrating for the whole group of lads.
"Everyone knows we’re better than what we’re showing, but you can’t wait until we’re 3-0 down to start. It’s not acceptable.
“The story of the season so far is we’re our own worst enemy."
He added: "Even last week when we got beaten 3-0 by Adelaide United, if you look at the goals, we’re gifting people goals and that needs to stop if we’re going to do anything.
“I felt we were in the game against Victory at 0-0 and then after a silly 15 minutes, we’ve found ourselves 3-0 down at half-time.
"In the second-half, I don’t think there’s any doubt that we were probably the better team, but it’s too late. The game was over.
“It’s just decision making that seems to be the masters of our own downfall and once we cut that out, then we can start to move forward.”
Oar unhappy with the goals they gifted Victory last night
McCormack’s teammate and former Socceroo Tommy Oar revealed Mike Mulvey was determined to bring back the winning culture which saw the club achieve success under Graham Arnold.
“It’s been a pretty difficult start to the season for us in terms of points, but I feel we’re heading in the right direction,” Oar told FTBL.
“We’re not far off being a difficult opponent and as we get more time playing together and get more cohesion, there’s no reason we can’t be winning more of these games.”
McCormack added morale was still sky high in Gosford.
“It’s got to be high, if anyone is moping around, then we need to remove them from the equation,” the striker said.
“The lads are first class, everyone is positive and we’re all on the same page. Where we want to go and how we’re going to get there, it’s just decision making on the pitch.
“Once we get that right, then I think we’ve got the makings of a decent team.”