Hansen took exception to a lengthy Television Match Official [TMO] check when Connacht fly-half Josh Ioane tackled Leinster hooker Gus McCarthy, with the officiating team ultimately deciding to just award a penalty.
In contrast, he felt, there was not the same scrutiny when Bundee Aki was hit by Jordie Barrett at a ruck.
The Irish Rugby Football Union [IRFU] provided the officiating team for the interprovincial derby, which drew a crowd of 33,963 in Dublin. Chris Busby was the referee, assisted by Peter Martin and Stuart Gaffikin with Mark Patton the TMO.
"You can't possibly tell me yourselves sitting there, like checking the Gus McCarthy one, how much? How much did they check that, 10, 11 times?" added Hansen.
"Bundee gets a direct hit to the head, it's quite obvious, no call, doesn't care.
"It's like we get that every time... and it's starting to get really frustrating for us because people will say we are an inconsistent team but when you are getting some of the calls we're getting, of course, you are going to be.
"I'm not making excuses by any means but, when you just get it week after week, I feel it's got to be spoken about... we just feel we're getting played out of games and we never ever get any calls."