As it turns out, popa’s wrong, popa’s right, and popa’s wrong, but I think still, popa’s right.
Popa seems to be wrong (unless there’s takah a different medrash) about Odom Horishon.
He’s right that HKB”H did melochoh bain hashmoshos.
He’s wrong that this has anything to do with us. HKB”H was able to be metzamtzem, which we can’t do (see Rashi on Beraishis 2:2), and, in fact, we have a mitzvah of tosefes Shabbos, and adding more time is a hiddur.
He is right, though, that early Shabbos is not really halachically ideal in most situations; there’s the issue of tarti d’sasri.