너희 is like... "yous". When speaking to more than one person. For example, 2 people are fighting, you can use that lol
Depending on where you are from, "yous" isn't an accepted word. Plural of you in English is they
He meant "yous" as in plural of you, not addressing it as an actual word. And no, plural of you isn't they.
I said "you do not like each other" and it was marked wrong. Could that be an acceptable answer