Yes there were penalties, and yes it's not all Daks fault. However in that instance and despite the 14/15 penalties he was still in a position (two drives) to win the game and on his watch/arm/management it failed.
In isolation you can say, that happens, but, the near same game ending scenario happened again the following year, so the focus shifts to why ..... this years performance vrs GB again indicated a lack of performance under pressure (indeed when the game was lost, and pressure was off, his performance improved).
Im not saying it's all Dak's fault, but he's not the solution.
The question back to you would be, how can he perform in regular season and then as soon as he hits a problem, in the play-offs does he appear to hide?