While I'm probably one of the few who don't mind the girl's POV, I do think that this arc is stupid
It's an unilateral massacre, even the stronger students get instantly killed without even realising it
But suddenly, the girl's group can just deal with it? Why?
While I agree that it's good to see the more annoying students finally get what they deserve, the power balance is all over the place, I mean, even the weakest students can kill some monsters together an gain some exp while doing it
As for the girl, the whole "yeah I should focus on what I know instead of using skills" is also stupid, because right after, she spam her shiny new skill (Silver World)
While she did merit her powerup, it's jarring because it's too big of a step up imo, it would've been better if the "Silver World" thing was a skill she already had from the start, but in a much weaker state, which then evolved while fighting (For example, Shirou's progression in Projection magecraft in Fate/Stay Night, since people here like to reference Gilgamesh)
Also, the big problem of the girl's POV is that she has to carry like 10 other students who are basically useless, while I agree with her wanting to protect them, it does become annoying on a reader's perspective because they kinda get in the way all the time
But this whole thing wouldn't have happen if the author let the girl make a deal with the goddess, something like "as long as I do good in the frontlines, please let the weaker students stay somewhere safe"
Even if the goddess is evil, she would have no reason to refuse, as she would gain "hostages", there's no reason for her to just send the students to their death either, it's just a waste of resources