Shrewsbury boss Paul Simpson said his team's 1-0 victory against Chester City was one of the worst performances he has seen during his spell in charge.
Substitute Richard Walker scored the only goal of the game from close range.
Simpson told BBC Radio Shropshire: "We were a disgrace in my opinion. That isn't a team that looks like they're going to get promotion.
"I'm delighted to get three points but I'm not happy about the way we've gone about it."
Town's 13th league win of the season at the Prostar Stadium saw them leapfrog Bradford and Rochdale into fourth in League Two.
Chester had their chances to win the game but Kevin Ellison hit the post and Ritchie Partridge spurned a great chance from close range.
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