The words "controversy" and "argument" mean basically the same thing. Together they emphasize how much Jeremiah is arguing. AT: "a man with whom everyone argues all the time" (See: [[rc://en/ta/man/translate/figs-doublet]])
This refers to lending money to people. Often lending money causes people to fight with one another. AT: "I have not lent money to anyone, nor has anyone lent money to me" or "I have not made anyone angry by lending or borrow money and then quarreling about it" (See: [[rc://en/ta/man/translate/figs-explicit]])