Gainsborough Trinity manager Steve Housham accused his side of 'awful' defending as they lost 5-3 at Solihull Moors in Blue Square Bet North.
Ryan Beswick bagged a hat-trick for the Moors while Luke Waterfall, Leon Mettam and Ryan Williams scored for Trinity.
"The scoreline flatters us because we got it close late in the game," Housham told BBC Lincolnshire.
"We only lost by two goals but we conceded five. Defensively we were awful and deservedly got beat."
Beswick was allowed to run at Trinity's defence and fire home in the fifth minute, and he doubled Solihull's lead just before the break when his intended cross went straight in.
Waterfall bundled home two minutes into the second half to reduce the arrears but the hosts restored their two-goal advantage seven minutes later when Gavin Cowan was sent off for a foul on Beswick, who converted the resulting penalty for his hat-trick.
Gainsborough were then awarded a penalty of their own when Leon Mettam was brought down, but his spot-kick was saved by Jasbir Singh.
Goals from Danny Spencer and Lee Morris put Solihull firmly in front before late strikes from Mettam and Williams made the scoreline a little more respectable for Trinity.
Housham felt Mettam's penalty miss, which would have made it 3-2, was a turning point in the game and was unhappy that the striker ignored his instructions.
"He wasn't even on penalties," he said. "Paul Connor was my penalty taker today. I knew we were going to miss because there were three of them fighting over the ball and they need to grow up.
"I can't see how we could go from beating the league leaders as comfortably as we did last week to today's match. The mistakes we made, the sending off, it's hard for me to praise anybody today."