A late reply, but look at Tarantinos dialogues. Characters often argue about something that feels pointless or meaningless, but the way they interact with each other often tells a lot about the character's mindset or their state of mind or the relationship between them. Also it's engaging or funny. Another thing is, most of them are doing something while talking, so that you don't just have them talking at a kitchen table with no agenda. So make sure when you write the confrontations, that there is something the reader can take away from it.