[YurgenJurgensen]

Like Shousetsuka ni Narou? I've actually seen novels originating there in an English small-town HMV with surprisingly prominent placement, and a similar amount of shelf space as Marvel and DC comics combined. Listed as "Manga Novels" for some reason. There were a few xianxia-looking titles there, but I don't follow Chinese media so I don't know whether they were originally web novels or not.

Given that HMV is a huge chain that mainly sells records and BluRays, they'd have to be pretty established to be there and not in a specialist bookseller or comic shop.

On the last paragraph: With how frequently audiences end up being dissatisfied with the endings of popular serialised works, I'm quite close to just giving up on serialised fiction entirely, or at the very least only considering reading or watching something once it's over. Whether it's manga (good anime adaptations avoid this problem, bad ones exacerbate it with filler arcs), US seasonal TV, live-service games, or novels that have "Part 1" in their title, the problems all end up being the same. Either it's unpopular and has to wrap up in less time than planned, resulting in aborted arcs and contrived endings, or it's popular and the author decides (or is encouraged by big piles of money) to drag it out beyond the original planned run, resulting in poor pacing, retcons, dubious plot twists, re-treading old narrative points and filler arcs.