I just noticed that your opponents didn't have a standard ADC. It a situation like that, I feel like the Blue build to be slightly better in that situation. Mainly because if gives you a much earlier fix to Ez's mana issue, allowing you to be more abusive in the laning phase. The ER/tri force rout would have been much riskier as well. Even though they would get you the mana and CDR you need, the damage you need, you would have to be in AA range to get that damage off. (Risky against champs like poppy and Darius.
I feel like what you needed really was an LW item to counter the enemy armor stacking. And BotRK would help you chunk out the High health targets.
Also, there is an undo button in the shop if you picked the wrong item. It should work if you noticed the mistake before leaving the fountain.