HBO Max has become a perfect example of how to launch a technically sound streaming platform and how not to market it. A week on since launch, complaints have poured in from bamboozled HBO Now subscribers wondering why they haven’t automatically been switched over to HBO Max, despite the two offerings each costing an even $15 a month. This breakdown in communication between AT&T and its existing subscriber base is typical of a lumbering pay TV operator – stuck in a cyclical process of launching new services and continuing to deliver woeful customer service. HBO Max’s stumbling start also represents another marketing mishap for AT&T, following on from the much-maligned seven-syllable mouthful that is AT&T TV Now. Running with HBO,…