You know, for me this is only different from "And she stepped out into the street and a truck hit her" in the sense that it allows for the nasty shenanigans being pulled in the following chapter. I have no respect for this development, it's gratuitous.
Somehow although objectively maybe it's not that terrible a move, subjectively for me it just breaks me out of the manga. It's weird, from being fascinated I'm suddenly just not interested any more. It's like, I suddenly shifted from feeling like I was reading about a life, to feeling like I was reading a plot being managed to maintain my angst levels, and I lost the immersion.
I actually stopped reading after this chapter because of reasons similar to this, I really liked the ex-girlfriends character, way more than the two MCs, and after being built up seeing her with nice parents and she was turning her life around, to just chuck that away with an accidental death just left me feeling really hollow. It worked well as a gut punch but then after that the manga just felt empty to me. How can I expect things to go well for everyone when the one character who wasn't a terrible person gets killed off after trying to sort their shit out. To me it felt like this was going to continue as a trend with only more and more of these moments happening.
I did like this originally, it had a load of potential and was a fresh idea, but yeah this manga just hurts me to much to be able to enjoy it