According to the lyrics, they aren’t exclusively complaining, they’re telling “good stories” about their not-so-great experience which is a different thing. Also, they never tried to be a ‘good guest’ at parties, merely that they were found to be ‘interesting at parties’ because of their ‘good stories’.

That said, I really wish they didn’t repeat lyrics so much and instead told more of those “good stories” they keep boasting about.