I really find it hard to understand why on ST people just come to trash either bikes or athletes or youtubers etc. Sorry for replying to your specific post and I am not saying don't do it if it makes you feel better. Liking a bike or not is very subjective and I am biased in this particular case as I do like the bike (but also like Canyon and Scott). From my point of view though most new super bikes are looking very similar with air foils on the fork and around the seat post. Gap behind the front wheel seems to increase aerodynamics as well which is probably the most extreme on the Ku. So from an aerodnamic point of view I believe (without having exact data) that there is not much difference probably anymore between any of those top end bikes. Assuming this holds true it all comes down to subjective preferences (and in some cases getting caught up in good marketing).
I think it's a public service to discuss bikes, good and bad. I'm with you on the Canyon, riding a SLX Disc for the past year and love the bike. Only quibble with it is the blue paint chips easily and the narrow aeropad width is not for everyone. (but works fine for me) I also agree with you that without data to prove otherwise, it's a wise assumption to make that different clothing and helmets will make a bigger aero difference than the aero differences amongst the top bikes from reputable manufacturers.
As for the Shiv, let's see. Expensive. (very) The hydration system simply does not work. If the cap does not fly off (friends who ride this bike ALL tape the lid closed), it still cannot be refilled in a race. This is renders it essentially useless (other than its aero purpose) The Canyon system on the other hand is easily refilled at aid stations with standard bottles handed up on any course any where in the world. Aero, convenient, and effective; the only drawback to the Canyon system is buying the proprietary hydrapaks at $40USD a pop as they are difficult to really clean thoroughly and need more frequent replacement. They are also tricky the first few times to install, but once you figure it out, it is actually quite easy to do. The criticism of the Shiv is not subjective, nor is the fact that the Shiv is very expensive relative to its peers. These are facts that in part explain why this bike has not been a hot seller despite being ridden by high profile pros and having the marketing weight of Specialized behind it. Agree the looks are subjective...and from some angles, I love the Shiv, especially the fork area from center on view.
So in short, someone in the market for a tri bike comes to slow twitch...reads how the bladder doesn't work well...and they benefit. That's what forums are for! Or they still buy the Shiv because they love it, but they go in with their eyes open about its limitations. Criticism is certainly not a bad thing!