Whether the Chinese did or didn't want British goods is neither here nor there, it was the Qing mandarins who decided whether there would be trade or not.
China was already accustomed to opium use, the manufacturers and traders only satisfied the demand by making it cheaper than it had hitherto been for Chinese importers to buy and market to the public.
The fault, as it does in Britain and America and all of Europe today, lies with the users and dealers. If one is true, so is the other.
As for bri'ish blabla, wewuzstan has never risen to the heights that Britain has declined to. Get the Chinese dick out of your mouth, they don't even notice you sucking it.