Steve Bruce felt two controversial decisions cost his Hull side the chance of easing their relegation worries at Swansea.
Hull remain three points above the Barclays Premier League drop zone after losing 3-1 at the Liberty Stadium, but Tigers boss Bruce was upset with the nature of Swansea's second goal from Bafetimbi Gomis and the 53rd minute red card shown to Tigers midfielder David Meyler.
"We were nowhere near good enough in the first half but two big decisions have gone against us," Bruce said.
"Gomis' goal is a fantastic piece of individual skill but he is five yards offside.
"When the ball comes back into the box we've had a collision between two of our players because they are worried about Gomis' whereabouts."
Gomis' acrobatic scissors kick gave Swansea a 2-0 cushion close to half-time but Paul McShane pulled one back five minutes after the break and Bruce felt his side could get something from the game.
But Meyler was sent off three minutes later for clattering into Swansea full-back Kyle Naughton, who took no further part in the game and was later sent to hospital for x-rays on his damaged ankle.
"I'm sure half of you press lads will say it's harsh and the other half will say it deserves a red card," Bruce said.
"I've now seen it six times from three angles and three of them I think it's a perfectly decent challenge and the other three he takes part of the ball but his leg collides with the player.
"The referee's given the decision by what he sees, and from his angle he might see it as reckless, but you may as well say in these grey areas you're not allowed to tackle on the floor.
"We all want our team to fight and compete because that's what the Premier League is, and I'm ranting and raving at my team at half-time to make sure there are a few challenges and we make a fist of it.
"We did that in the second half, we showed far more urgency but you don't usually get something out of a game when you go down to 10 men."
Swansea manager Garry Monk confirmed Naughton had gone to hospital to have his swollen ankle assessed.
"We hope it's not a serious injury and Naughton is the only negative on the day," Monk said.
"It was a genuine 50-50 ball for both players to have and my initial reaction was that it was bad challenge.
"I don't think there was any malice from the player but you always run that risk when your foot goes over the ball."
Swansea's win took them to within a point of their best Premier League points total of 47 with seven games of the season remaining and Monk said beating that mark continues to drive his players on.
"Everyone has said we're not fighting relegation, we're not fighting for Europe – what are we fighting for?" Monk said.
"But we've got our own targets and our plan is to surpass that points total.
"I warned the players at half-time that Hull were fighting for their lives and they would throw caution to the wind but the commitment and desire was there from my team and ultimately we go that deserved third goal."
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