I blame Southgate for that. You have guys like Rashford and Sancho on the bench. You can give them at least 2nd extra time to stretch the legs for sure.
Exactly, Southgate could have subbed them in for atleast the last 5 minutes. Let them warm up on the pitch for few minutes instead of asking them to take the penalty after being subbed in. Those two are considered as top class players, they could have done a thing or two instead of just being a penalty takers then ended up failing to score.
Anyway Manchester United did the same thing on Europa League by subbing in Mata and Telles on the last minutes, both ended up as the 1st and 2nd penalty taker but it worked out for both of them
It was for me as well a surprise that Southgate chooses Saka for taking the last penalty. Too much pressure for the youngster and IMO, without any reason. There are other players that can take it, I couldn't agree more with you.
There is no way to tell that it was going to be the last penalty though. The order was decided before both Rashford and Sancho failed so it puts up alot more pressure for Saka but if you look at the other POV, Donnarumma was the reason that Saka failed. This guy is a genius when it comes to penalty, just look at his reaction after he stopped that penalty. It was like he knew that he would stop the last penalty