Więc on nie jest tak dobrym przewodnikiem
Can someone please explain why it's dopełniacz, ("mapy") not biernik ("mapę")? Thank you.
what is the reason for using genitiv after this verb?
Well, usually the answer is "it just needs this case", but maybe you can find something interesting [link removed for safety reasons].
thank you, this is very revealing
Why is this wrong? (so I know) często nasz przewodnik używał mapy
The adverb często should precede the word it is referring to, which in this case is "used" and not "our guide".