North Wales Crusaders head coach cut a frustrated figure following his side's 37-36 defeat at the hands of Rochdale Hornets in Colwyn Bay.
Speaking following the game, Forster admitted he was hurting from the manner of defeat: "I think you can only look at the game in one way, he said.
"You're playing at home and you've conceded 37 points, you can't be expecting to win games when you do that.
"What makes it worse for me stood here now, and admittedly it's raw at the moment, is that it's another week where we've let ourselves down and some individual errors have cost us the game."
Crusaders battled throughout the game, with the lead exchanging hands on several occasions, and Forster's attention now turns to next weeks visit to Hunslet: "The good thing about sport is that you give yourselves a chance to put it right next week.
"There's been a bit of adversity in the camp this week, losing players to injury and other lads putting their hand up to play when ideally they shouldn't, but that's not me making an excuse.
"We'll get back in on Tuesday, we'll review this game and turn our attention to Hunslet next week.
"Will there be a few changes? I'd think so after that, but the lads know that wasn't good enough and we'll move on and channel that frustration into putting things right next weekend."