This thread can go on for years with folks chiming in with "I have only had great service in business" to "UA Biz sucks" to anything in between.

As has been discussed here many times, UA's service on all facets (inflight, on the phone, at the airport) is so unbelievably inconsistent--and this is what you experienced, unfortunately.

I would write to Customer Relations:

-this was your first "int'l business class" experience; if this torture is how it is, tell them you'll save the fare premium and "enjoy" E+.
-alcohol control...was your wife dancing on the traytable? Doubt it. My guess is with the lackluster service, they threw that line your way so they wouldn't have to work any harder.
-Look in Hemispheres..."United is pleased to provide its passengers with 'gate-to-gate' audio."

I think if you just stick to complaints about the service, your comments will be much better received by CR. The A/V and wines...yes, it's not good...but if you throw those in it sounds like you're a crybaby just looking for a $50 coupon.