On those days, it's tempting to think about some rose-tinted previous release where "everything" "worked" or the requirements weren't attached to a bungee rope or the interested parties had a common lexicon or the team wasn't spelled tiiiiim or whatever.
But that's just a waste of time and mental energy, and likely to lead to ennui and sourness. (OK, extra ennui and sourness.) When I find myself at the top of that slippery slope, I remember the wise words of Mark E. Smith in It's A Curse: "Balti and Vimto and Spangles were always crap, regardless of the look back bores." Utterly negative but, crucially, direct: that was then and this is now.