No, I'm simply answering the question "How many big chances did we and West Brom create?". A big chance has a relatively high chance of being converted into a goal; that's not at all the same as saying it "should" have been converted. To look at it in terms of the xg of the chance, Crnac's big chance had an xg of 0.43, meaning the average striker would convert it 43% of the time, i.e. the average striker has a greater chance of not converting it than converting it. "Should have" is simply not a useful concept to employ in this context.
