The phrase "poor refereeing" means that the referee in a game or match did not make fair or correct decisions, leading to unfair outcomes or mistakes during the game. Full definition
In my opinion, that is 6 points dropped due to extremely poor refereeing decisions at times of the game where it had a massive impact. (shewore.com)
With Arsenal and Manchester United experiencing the effects of poor refereeing first hand this season, how has the officiating had an impact on the 2014/15 Premier League campaign? (caughtoffside.com)
They went on to the finals that year and narrowly missed out on the trophy to a Barcelona team aided by poor refereeing. (justarsenal.com)