first of all when you're advancing research hand axe and pickaxe. Also you should go for frontbase unless you're sure that you either rush, or wont lose it like that. Secondly when you were losing your army on the big fight you should've pulled back, don't just leave your units there to die. Then advancing to heroic without any military wasn't a very good idea, but it could've still worked if after taking second Town Center you would have pumped villagers from _BOTH_ tc's. This is important to do. If you're having more than one town center its always multiple times the amount of villagers per 16seconds if you're making em outta every tc. Oh and most important: Always raid his villagers, You saw his goldminers but you weren't doing anything. And in 15minute mark u should also have some armory upgrades and the 2nd economy upgrades from wood and gold aswell as plow and husbandry.