Adapt
If you're playing Darius and the enemy team consist of Riven, Yasuo, Kai'sa, Evelynn and Blitzcrank, you do not need a Black Cleaver at all in that match! You're laning against Riven, armor and health are the best things going for you, not damage. So maybe a FrozenHeart/TitanicHydra or RighteousGlory/SteraksGage combo.
If you're playing Yasuo against a Cass/Xerath/Veigar, rushing a Hexdrinker will be more beneficial than getting your damage spike.
If you're playing any mage except Lissandra/Fizz/Anivia against Talon/Zed/Yasuo/Wukong/Jarvan/Vi, your first item should be Zhonya's Hourglass.
Don't complain about balance and champs being broken when you're building Abyssal Mask and Adaptive Helm Galio against a full AD enemy comp! Do you know how stupid you look when your match history shows 0/8 Galio with
against

If you want to be taken seriously and not looked at as a troll/noob, please build on a match to match basis. Thank you.