The Celtic midfielder responded angrily to being substituted in last night's 3-1 defeat to Molde.
The Hoops lost their first Europa League game this season in disappointing circumstances to make qualifying to the knockout stages a tough ask.
Conditions were difficult but Celtic only had themselves to blame as Dedryck Boyata’s slack pass allowed Ola Kamara through on goal to give Molde the lead with 11 minutes gone.
A second from Vegard Forren on 18 minutes put the Norwegians in command and they quickly put to bed any chance of a Celtic comeback after scoring their third less than a minute after Kris Commons had pulled one back for Celtic in the second half.
The 32-year old was substituted with 15 minutes remaining despite his goal and made his displeasure abundantly clear to Ronny Deila.
“Everyone is angry when they get taken off," said Brown, in quotes published by the Herald Scotland.
"I didn’t see what happened but I’ve got to be honest, it’s a team game so whatever decision the manager makes we’ve got to deal with it. From start to finish we were not good enough all over the park.
Late substitute Mackay-Steven also gave his take on the incident:
“Kris was angry but it’s like that most times when you get beaten," he said. "Nobody likes to lose. I didn’t actually see Kris coming off but yeah, we are all looking for answers. It’s up to us to go into training and work hard to put it right.”
The Hoops sit bottom of Group A - with two points from three games - and will be eyeing two wins when Molde and Ajax travelling to Glasgow, before a final showdown with Fenerbahce in Turkey.