Miller seems, and I say seems because we don't really know what these players are going through, but he seems more focused on things outside of hockey, like his model girlfriend and dying his hair blonde. Guy said his idol growing up was Odell Beckham Jr. Not exactly the best role model.
I'm not really sure what else you can really say about this guy, he is an enigma, an uber-talented player but just lacks the drive and focus to really get better. Seems like he'll figure it out elsewhere a la JT Miller. Hopefully not, I haven't given up on him like some may have but at the NHL level, the difference in these players is usually work ethic.