

Whenever I’ve read that passage, I’ve usually considered his underdog-ness to be from him deciding to not wear even the king’s fancy armor, and from him being the youngest child in his family. So he looked even more dwarfed by Goliath than he would have had he worn armor, and since he wasn’t one of the elder children in his family (despite being a teen or adult), no one in the culture at the time was expecting him to become a hero–much less a king later! But him eschewing the armor in order to keep his agility and range of motion for using a sling makes total sense–I think King Saul was just miffed that his offer of his own personal armor was rebuffed 🤣
EDIT: minor correction
I cheat and use Loc-a-Sok sock holders. I still may take forever to get my laundry out of the dryer, but almost never lose a sock!