I agree to a certain extent. I don't necessarily think they are poorly designed. I think it takes a little bit of time using a product and getting to know it to really get a good sense of that. One of the first decent phones I got a few years back (Ety HF5) I thought originally was very poorly designed with a really underwhelming looking build and a terrible cable. But I have had them for a while now with no signs of slowing down and it's the one phone I don't treat with great care or use cautiously at all. The cable has turned out to be very sturdy and the build has actually been very durable despite looking very cheap.
I do agree that the Ocharaku IEMs were meant to be used indoors, but the Kaede at least looks sturdy enough to be used quite a bit for these applications. It's very nice wooden tea box/carrying case also indicates that it's not meant to be carried around and used outdoors. However, I got them to with the intention of being a portable full-sized open like phone that I could use at work or at home when I do not want to use my bulkier and non-portable open backs. For that they are working out quite well so far. It will be a test of time, for me at least, to really know if they are poorly designed or not for my applications.
With regard to the CK100Pro, I am really glad I was patient with them. They reminded me again of the lesson the Ety's taught me when I was first getting into the hobby, that in my personal case, exerting some patience with products if they don't work out initially may be worthwhile. That is of course a personal choice and there is a lot to be said for first impressions and why people might disregard a phone on first lesson or longer auditions. The CK100Pro is very polarizing in this sense.
Like you, I was not thrilled initially when I first got it because it was very bright, the fit was a bit weird, and it hisses like crazy with some gear. But after a few days (maybe longer) of tip rolling, messing with insertion depth, and trying out different sources, I was rewarded with what is IMO a really wonderful sounding phone. And one that has held up very well to a lot of newer much more expensive gear. But it took some patience and a lot of reading and talking to other users to get there. Now, despite thinking initially like the Etys that they were very poorly designed, think they were very well designed. Despite this, I can absolutely see why someone would not want to do that and get a phone that is more immediately gratifying, and there is definitely nothing wrong with that. It is just that in my personal case, being a little bit patient and waiting to really get to know the phone has often been pretty rewarding. Which is why I am reserving some judgement on the Kaedes until i get to know them a little better.