Sydney had the better of the contest against the Glory in Perth, but the game had just the one goal and that came after Glory attacker Ryo Nagai was clearly offside but allowed to play on.
He subsequently was nailed by Sydney goalkeeper Vedran Janjetovic to earn a penalty and Steve McGarry scored to eventually give Perth the victory even though the Sky Blues outplayed the home side during the warm afternoon.
Looking live and indeed on replay Nagai appeared clearly offside to everyone besides the adjudicating linesman, and for Farina he thinks it is unacceptable that such a clear mistake cannot be referred to a video so it does not decide the result of a match.
"I was disappointed with that and I thought the linesman got it wrong. Again it was a big decision especially when a team is under pressure coming into games that early. The foul was a foul, but I thought it was offside before that even from watching it live," Farina said.
"Then the replay that I saw confirmed it for me. It's not good enough. In days like this you wish you were playing rugby league or rugby union where those things won't happen but unfortunately in our game it does and it's not the first time this season in four rounds.
"I've always been an advocate of it (video technology) and the reality is that it's not going to happen for a long time, but certainly it's not going to disrupt the game any more than when a goal is scored, or a penalty is taken.
"There is time to go to the vision and if we have that technology, those things don’t happen. People will say I am bitching or complaining, but we are in a massive industry where a lot of money is poured into the league and teams.
"If you are going to have people who are semi-professional determining the results of matches, that for me is wrong. It's sad and it has to be looked at."
Farina couldn’t hide his frustration at the fact that results in the A-League continue to be determined by decisions made by people who are not one of the 22 players on the pitch.
"It's not good enough and if people who aren’t involved on that square actually playing are deciding how games go, for me that's a sad indictment of where we are heading," Farina said.
"I'm sure that there are other coaches, I'd say all of them would agree, that it's not good enough. Unfortunately that guy (linesman) goes back to his job during the week and will get another game next week, and the same thing might happen. It's just not good enough and sad."
Understandably, Glory coach Alistair Edwards wasn’t about to complain about the decision going his team's way.
"I think it is fine as it is to be honest," Edwards said.
"It will even itself out throughout the season and even with the technology, some decisions go with you and some against."