This is dumb. This manga was already a mess of cliches and hammy tropes, and now it's somehow getting even stupider.
The Magic Nobles were ALL corrupt and evil and are now betraying the SMT and Japan to harness the power of the calamities to increase their own power? Gee, who could have seen this coming? It's not like they spent the ENTIRETY of the story so far being blatantly corrupt and evil, right?
(rolls eyes)
Yeah, no. Their "redemption" was utter bullshit. It was extremely stupid that he decided to brush away their attempt to attack him in his sleep and even blackmail him by attempting to take his teammates hostage. It was blatant proof that they were just as evil and corrupt as Fuuka Jin. The only reason that this betrayal is happening is because he decided to ignore the obvious red flags. The author keeps flipping back and forth between having his MC be smart or stupid, and it is frustrating beyond words.
I can already tell that MC is going to pull an asspull of a comeback that's even stupider than that time when he staged a fight with "Chrono" (himself) just to "prove" that he's totally not Chrono.
There was virtually zero reason for MC to still be using the Chrono identity at that point. He originally took up the identity to do illegal vigilante work. Once he got the legal jurisdiction to take down demons and illegal mages as Captain of the SMT, he should've just abandoned the whole Chrono identity. But author wanted a secret identity trope on top of the already secret identity of him being a reincarnation of Ichikami Atsumu.
After this arc, I don't see how this story can possibly continue. The demons have devolved from an antagonistic force to a mere plot tool. The Magic Nobles have taken over as the overarching antagonists of this story, and now they've completely outed themselves as being corrupt traitors. There's no feasible way that they could continue to be threats after MC and co. somehow defeat them here. The Japanese government would have to be either corrupt, incompetent, and/or even stupider than MC to let blatant traitors maintain their political/military positions.
The author will either have to invent a new threat, OR she/he will end the story after this arc. The introduction of stronger demon types barely raises the stakes when we readers already know that MC can handle all types up to the Demon God shown at the very beginning of this manga. I suppose that there are stakes in that MC might not be able to handle ALL of the demons before there are casualties, with the SMT bogged down by the sheer number of threats...