First, I don't think Chapel is a good enabler for FG rushes.
Second, your opponent didn't Chapel very well (didn't trash Coppers even though he still had enough in hand to buy another FG).
Third, Spice Merchant has no place in a Chapel-FG game.
=========
All that being said, I don't think Envoy-BM does poorly even against good Chapel-FG. Just my gut, though.
However, I think Spice Merchant-FG does pretty well! Especially with the +buy/+$2 option. He would have done better without the Chapel!
Just my thoughts.