Daniel Candeias' sending off against St Mirren was "embarrassing", says Rangers manager Steven Gerrard.
Candeias was booked for celebrating his 80th-minute opener with the Rangers fans, then was given a second yellow by Willie Collum after an exchange with Anton Ferdinand.
Gerrard initially called it "a coming together" but, after seeing the incident, he said: "So Daniel gets a yellow card for that? Come on, lads. Be serious. There is your evidence, that's what you're dealing with."
The victory - just Rangers second away from home in the Scottish Premiership this season - moved the Ibrox side to within five points of league leaders Hearts.
It comes after a meek Scottish League Cup semi-final defeat by Aberdeen last Sunday and their first spilled home points of the campaign against Kilmarnock on Wednesday.
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Gerrard was pleased with the reaction after what he called a "sticky and frustrating" week.
"We asked the players to step up and take responsibility and they've done that," he said.
"They never give up and even though we've had a frustrating week it's not been through lack of trying - we just haven't had that run of the ball or the quality to break sides down.
"We've got a good group of lads, who understand the week we've had and we're all on board in trying to put that right and they've done that I thought they were terrific, especially second half."