The Canadian club again conceded in the final ten minutes for the sixth time in seven matches which extended their winless streak to eight in the league and prompted ire from Nelsen who is getting sick of his side's costly defensive errors.
"I think we were playing really well. They defended the box, were confident on the ball, got the goal and were looking very comfortable. Then [we] switched off on a throw in during the second half. It was just an unbelievably soft goal, but we have been doing that all season," Nelsen told MLSsoccer.com after TFC squandered a goal-lead following Justin Braun's 14th-minute opener.
"I don't think an opposition team has earned a goal against us yet. It has just been cases of us switching off and they just walk it though into the back of the net."
He added: "We haven't had a clean sheet yet. No team has played through us or broken through us or stretched us or won any one on ones or scored from outside the box.
"We are just too soft and we have to be hard. We have to change that and we will change that. We're bringing in players who will know how to defend and who will have the confidence to get on the ball when the pressure is on."