That manufacturer should just switch to direct-sell. Distributing through LBS apparently doesn't add value for customer.

OP likely would have read the instructions better had he not relied on LBS.

Custom-ordering a very expensive bike should yield a very well fitting bike tailored to OP specific needs. The way it turned out a BSO would have been a better fit, at least a test ride in store would have been possible.

But support your LBS, no matter what.