Mormegil sits pondering "how did it all go wrong...all I did was declare myself as the Hunter...where did I loose them?"
(sorry to bring that up again

but it's how I truly felt.)
While the hobbits fought on, Boromir alway thought that a refreshing drink of Miruvor was needed before battle. History doesn't tell us, but the truth of the matter is that Boromir was simply too drunk to be effective
or
Pippin never quite discerned between orcs and trees so while Merry attacked an orc he was busy stabbing the nearby tree
Pippin: "This one is for the shire...die you evil fiend"