It might be a case of the money starting to run out. The author might have been given a deadline of X months or years or something to finish the story. It happens quite a lot in manga as well. I've finished multiple of them already where there seemed to be a nice pace going on for 100+ chapters, and then suddenly in 5~10 chapters everything is finished up.
As sucky as it is, there's not much to do about it. If they can't make a profit, the manga/manwha will stop. At least getting a quick ending to a story is still a bit better than the author just cancelling the rest of the story and never releasing again.
Now they really akip alot of things, like usually a fight like that would give 3/4 chapter to explain the effect of pills, how she fight them and how or who she fight until she bloody like that. And how th guy got alert, like didn'tthey promise to meet 10 years later but now he just suddenly here without any explainantion or suspense. Now it's just skipping all the plot to complete the story faster. And it's bad cause reader can't get themselves immersed into the story now. The art also not to consistent sometimes its good sometimes its not, like I can't see the difference between her appearance that make the enemy realise she's a woman. But still bereable so I'll just pass it. Just hope it continue improving cause I see some improvement when compare the previous chap where she suddenly at Danyang Sect.