Learn Dutch: Waarom beschuldigt ze jou vanwege dat gedoe? - Why does she accuse you because of that hassle?

You're right that accusing someone of something is iemand beschuldigen van iets. However, vanwege means "because of" or "on account of". In this sentence, the specific thing you are being accused of is left out. The hassle isn't the crime; the hassle is the reason she is making the accusation. If she were accusing you of the hassle itself, it would simply be: Waarom beschuldigt ze jou van dat gedoe?

This lesson covers words like "ervan". How would I add "of it" to this sentence to say "Why does she accuse you of it because of that hassle?"

Since the verb beschuldigen pairs with the preposition van, you would combine er + van to mean "of it". You would place the resulting pronominal adverb ervan right after the object (jou). The sentence would become: Waarom beschuldigt ze jou ervan vanwege dat gedoe?

What exactly is "gedoe"?

Gedoe is a very common noun (a het-word) that translates to "hassle", "fuss", or "bother". It is derived from the verb doen (to do) and refers to a situation that requires frustrating, unnecessary, or complicated effort. A great native-sounding phrase to remember is Wat een gedoe! (What a hassle!).

Could I use "je" instead of "jou" in this sentence?