The 11 England players on the pitch at the end of extra time:
Pickford
Stones
Maguire
Shaw
Phillips
Rashford
Sterling
Saka
Sancho
Grealish
Kane
Out of that lot, who screams 'definite penalty taker/scorer'? Kane is one, obviously, and I would say Rashford as well - he's taken them at club level and he scored a penalty in one of the pre-tournament friendlies. After that, you're struggling a bit - Sancho has scored a few for Dortmund but isn't their regular penalty taker, Grealish doesn't take pens for Villa, Sterling has a poor record at club level. So basically you're relying on confidence and what they've shown in training. The mistake was probably having Saka as the final taker - if he and Rashford had swapped places it might have worked out better. I seem to remember reading somewhere that you want your best penalty takers either first, so you get off to a good start, or last, in case you need to score to win - probably why Italy had Jorginho as the final taker. Italy also had three players (Berardi, Bellotti, Jorginho) who were regular penalty takers and scorers for their clubs, which gave them an advantage - and yes I know Pickford saved two of those players' penalties!
I suspect Southgate is saying that he picked the penalty takers because if he'd said something like 'I asked them who wanted to take a penalty and Saka put himself forward' he'd have been slaughtered for throwing a young player under the bus. I'm sure he wouldn't have picked somebody who didn't feel confident taking a penalty - maybe Saka overestimated his own abilities. Let's face it, plenty of players, both experienced and inexperienced, have done this.
Finally, the constant droning on about Southgate being awful and negative is getting really boring - perhaps people could start suggesting potential replacements (and no, 'I dunno, someone else' will not cut it). Although since nobody ever seems to suggest who might do a better job, it looks like the standard 'I want the manager gone - I don't really care who replaces him as long as he goes' sort of rant. Which is okay up to a point, but it's an odd sort of complaint when said manager has just done what no England manager - whether good, bad or indifferent - has done for 55 years and got to a final. If we'd been turfed out at the group stages for the last two international tournaments I could understand this, but on the back of a final and semi-final, after years of underachieving? Tough crowd...