Chris Wilder was left frustrated after seeing his team fail to capitalise on a positive start against West Brom on Friday evening.
David McGoldrick gave the Blades an early lead, only for Gareth Barry to restore parity before the break and Kieran Gibbs scored the only goal of the second period as the visitors left S2 with the spoils.
Speaking in the aftermath, Wilder remarked: "We need a lift, you only have to look at our bench to see that. We need to improve the squad in certain areas, but we should still be doing better with that group of players.
"They need to play better, it's basic football that we've not got right. It's unlike us, but the mistakes and poor decisions spread quickly.
"We play in a way that pushes the opposition back, but we haven't been good enough right the way through to really challenge a really powerful club."
Wilder added: "This style has worked for us and got us into this position, but we need to show that bit of quality to takes games away from the opposition.
"We'll have to regroup and go again, but we didn't hit the heights we can or give the supporters enough to shout about."