Manager Steve Housham felt Gainsborough Trinity were below their best despite beating Hinckley United 2-1 at the Northolme in the Blue Square Bet North.
Goals in each half from Ryan Kendall and Darryn Stamp put Trinity 2-0 up.
Keeper Andrew Pettinger saved a twice-taken Lloyd Kerry penalty before Tom Byrne pulled a goal back in added time.
Housham told BBC Lincolnshire: "We were poor but still came away with three points. A lot of the basics we did wrong today and that's disappointing."
The victory maintained Trinity's perfect home record this season and kept them in fourth place in the table.
But Housham added: "I don't think we were at the races and at half-time I lost my rag in the dressing room and told the players so.
"We didn't show enough bite but it's three points. It keeps us up there and it shows we're a good side, that we play poorly and still get the points."