Probably an unpopular opinion, but some bits I've been thinking in regards to Dead Man's Party now that I'm older, particularly the big argument near the end of the episode. Yeah, the Scoobies weren't particularly supportive or empathetic, but look at it from their side.
Buffy left town without a word and no warning, has been missing for three months, and kept zero contact with any of her friends or loved ones. In that time, on top of dealing with their own issues, they've had to watch Joyce worry over her daughter and Giles chase multiple dead ends to track her down. Yes, they didn't know that the spell to re-ensoul Angel had worked at the time... because Buffy didn't tell them; Giles had to make up a story on a spell to seal Acathla away to trick her into doing so.
How many conflicts throughout the show could have been solved if she would just stop hiding things and actually sit down and talk to the other Scoobies for just five minutes, especially in Season 3? In Season 7, they even call Buffy out on always closing them off and only letting them in whenever she wants.