it's only me or the new chapter's quality is really low (⊙…⊙ )

It's because they're fan translations, not the official ones. You can find the official translation for chapter 14 here > http://www.lezhin.com/en/comic/killingstalking

An official translation of 14.5 hasn't been released yet. I think Lezhin is finally cracking down on all of the illegal posting, so poor-quality fan translations will probably be the best you can get on free sites from now on.

yup especially 14.5 is so misleading.