Here does Pip stay in chapter 43? And whom does he share a bad conversation with? Why is it unpleasant ?

Pip returns to his home town and, at the town inn, meets Drummle, who is obviously courting Estella. The two pass rude words to each other, then they depart on their own ways. It is unpleasant because Drummle is the man (or type of man) Estella had been groomed for all her life.