The horse is obviously well regarded, his strength in the market the last twice would tell you that and with Hughes not having ridden him before, I'd suggest that Channon hs told him he's a good horse. That in mind, when the horse is cruising through the race on the bridle, it's no huge surprise a jockey like Hughes doesn't really go for him straight away. Has Hughes been on board or watched the reappearance effort, then he'd have seen that riding the horse for a turn of foot was incorrect and for that reason it was a bad ride, but sometimes jockeys are only as good as their instructions. You cannot expect them to know the horse as well as the trainer should unless he is stable jockey.
If Hughes was told that this horse doesn't have a potent turn of foot and shouldn't be ridden for one, then 100% bad ride his fault, however I'm blaming Channon in part for failing to ensure his jockey was sent out with adequate instructions. I know I'm in the minority on this one, but there are worse places to be!