Shio no Kikan ~Moto Yuusha no Ore, Jibun ga Soshiki Shita Chuunibyou Himitsu Kessha o Tomeru Tame ni Futatabi Isekai ni Shoukan Sarete Shimau~ - Ch. 1

[JustSomeGuyOnHisPhone]

The pacing is pretty face pace, but let's be real this is probably not our first time seeing similar plots like this

Not much to say but decent honestly

 

[ClemCa]

So a random royal family took credit and Helheim was split on whether or not to fight back?

 

[ClemCa]

But seriously, why isn't he angry at the goddess, like at all? Doesn't make any sense.

There could be several reasons:

• He was, but things change with time
• He just didn't express it
• The classmates were given the ability to protect themselves, but they fell from their own doing (overconfidence, misplaced trust, etc)
• They willingly accepted at first, maybe some felt pity for the world's plight, others were chuuni, and the rest just followed the majority opinion
• The goddess counts more as a force of nature than anything else, it's like getting angry at a storm

Without more context clues we can't really know, but there could be plenty of legitimate reasons for that.
The assumption that because we're only seeing a quick breakdown, that's all there is to the story is inherently flawed.