As a media tech guy (running the media tech department of a university, which includes a DCI conform cinema): absolutely everybody hates HDMI. It is unreliable as hell, both physically and as a protocol. It tries to be too much to too many people and most devices, including expensive "pro" gear includes unchangeable random weirdness like ignoring EDIDs or forcing them onto you, that is documented nowhere and you can only find these things out when you buy it.

Add to that the fact that consumers/users can break the picture/sound in 100 different ways on their devices and you get a veritable support nightmare.

I wish it was just DVI+ but it does so much more.