Chris Wilder couldn't hide his frustration following Saturday's 2-2 draw against Gillingham at Bramall Lane.
Billy Sharp put the Blades in the ascendency in the first-half, but two goals from Gills midfielder Josh Wright after the interval meant Kieron Freeman's fourth goal in five matches was only enough to earn the hosts a share of the spoils.
But, despite creating a number of chances and seeing two goals ruled out for offside, Wilder wasn't impressed with his side, remarking: "I didn't go mad after Walsall but I did this time, I'm not being disrespectful to the opposition, but we've chucked two points away.
"Every team, every player we come up against has a go, but we talk about raising our game further, especially at home but we haven't and it's poor.
"The game should be over by half-time. We've played well enough to dominate the game and create chances. But we're not ruthless enough, we lack that composure, final ball or finish too often."
A bitterly disappointed Wilder added: "I said at half-time that if we don't put teams to bed then we could get punished and we were punished for a sloppy beginning to the second-half.
"We were guilty of just going out there and expecting it to happen and we got a shock.
"Gillingham have caught us cold twice, they equaliser from nothing, then score off a long throw for the second, We told the players and emphasised to them that is Gillingham's biggest weapon.
"Myself and Alan (Knill) have told the players it's coming and will keep coming, but they win the first and second ball and score another goal and suddenly we chasing a game when we should be out of sight."