Agreed, but as far as offsides go, Dzeko's wasn't even close. He was a good couple of feet onside with both the ref and the linesman having an unobstructed view. That's a call that quite simply an experienced team gets right.
Agreed that they need help. These mistakes have massive repercussions and the risk of them being repeated can be managed either by (a) technology or (b) having the best personnel available to manage and reflect these games of high magnitude.