Roommates teach you to bring up the dishes on day two, not day sixty.

Small annoyances are cheap to mention early and expensive to mention late. On day two, the dishes are a request. By day sixty they have collected two months of resentment, and whatever you say comes out bigger than the dishes ever were. Living with someone teaches this faster than anything, because there is no gap to hide in.

Think of one small thing that has started to bug you at home, on a team or in a group project. Say it this week while it is still small and boring. One plain sentence now saves a hard conversation later.