The Steelmen had just cause to feel aggrieved as they were the victim of several controversial calls by referee Stevie O'Reilly on Friday night.
The man in the middle failed to spot that Stevie Hammell's header had clearly crossed the line to make the game 1-1, before later awarding Pat Fenlon's men a penalty kick when the left-back's challenge on David Wotherspoon appeared to be outside of the box.
But despite Lady Luck failing to smile on the Fir Park club, McCall, who witnessed ace Michael Higdon blaze a penalty kick over the bar when the score sat at 2-0, has called on his men to show more of a cutting edge.
"Key moments of the match that would have turned the match against Hibs quite evidently went against us and there's not a lot you can do about that," he said.
"In the first half we created chances, we're just not taking them, and that's the difference between winning and losing, you need to take the opportunities when they come along.
"And you don't blame anyone for missing penalty kicks but Leigh Griffiths scores his two, we miss our one. Even at 2-0 down if the penalty had gone in I thought we could go on and win the game.
"We snatched at things and just weren't good enough in the box."
The defeat sees Well slip to eighth in the SPL, with their last win coming back in September.
However, there was no denying that McCall's men were up against it given the key decisions that went against them.
"We created chances and scored a goal when the ball was a foot-and-a-half over the line but the linesman was adamant that it didn't go over," said the Fir Park boss, whose side will look to bounce back in Perth at the weekend.
"In the second half we came out and again had pressure, but they break and get a penalty.
"We then get one, miss out, then the go and get another that, if it's a foul, it's outside the box.
"I hate whinging about officials, but key moment in the game went against us."