trader was huge here.
Spent all his early buys on engine components while getting free money and thinning out crappy cards.
By turn 6, excluding his +draw cards, he had 4 silver (8$), 1 woodcutter(not a great buy 2$), 1 lighthouse (2$ value,sorta), 7 copper (7$), and 2 0$ cards (trader and estate).
Look at your deck at the same point. You had 2 less silver, 2 more estates, and didnt have the woodcutter (which should have been silver) or the lighthouse.