Hindsight is 20/20, but it seems Southgate made a few critical tactical errors:
Parking the bus after taking a quick, surprising lead. They were happy to wall off Italy and play for the 1-0 win, but in reality, they gave Italy way too much time in the ball and eventually they found a way through.
Not playing Sancho or Rashford until the final minutes, especially when it seems they could have used some attacking reinforcements.
The pens will get talked about, but that typically comes down to who wants to take one. Credit the young guys for stepping up, but no way should Saka have been 5th, and if you’re subbing on 2 guys specifically for pens, you have to do it sooner.