@Kaldrak
There are tons of badly written cultivation stories, but that isn't because of the cultivation theme. Most of the translated Japanese LNs are equally as bad. That is mostly because they all started as web novels, and most of them were from first time authors. Do note that I am talking about the web novels here, most cultivation themed manhuas are straight up s-... not good... in my humble opinion. In general LN to manga is easier to do than 10000 page webnovel to manhua.
For those who are curious about the genre:
There are very good cultivation novels where the main character still ends up extremely extremely overpowered by western comic book standards. That is just a feature of the genre.
Think of the cultivation theme as a more formalized/Dao oriented version of Dragon Ball. Not the original Dragon Ball mind you, but everything from original to Dragon Ball Super and then multiply Goku's power by xxxxxx order of magnitude (keep increasing as required by the story).
It certainly has its ups and downs, but it is generally fun.