This is less about Y+ and more about which crew you have. I flew Vancouver to HKG four times in J and both times I got crappy services due to Vancouver crew, I even remember the faces of those crappy services flight attendants because their services are so crappy. I am so disgusted by this that I don't bother with this route anymore.
CX, for the most part, are very good with training their inflight crew, I think you just have to report them. As bad as that sounds, that may be the only option to make sure you don't get the crappy services in the future. You can't expect management to deal with them if no one is telling them what's going on in the front lines of service.