I don't find this shitty at all. Zoomers might think it is cringe because zoomers haven't left school/college. Let this Gen X tell you the bitter truth. All those "best buds" you made will drift away until only 1 or 2 true best friends will still stick with you by the time you're 40.
That just means you didn't make more than 1 or 2 close friends and completely stopped making new ones. It's not life advice, it's just what happened to your personal relationships.
I'll reiterate what I said in the last thread: it's just shit writing, man. Not worth continuing.
Also I'll add some actual friendship advice here: you're never too old to make new ones, and not limited to only one or two close ones. If everyone else is drifting away from you... that's probably you drifting away, and blaming some "bitter truth about friendship that you can't control" is a coping mechanism, nothing more.
I'll be dropping this here, because Sora is not a real character and this whole separation arc feels very much like driving the only actual characters offscreen because they're stealing the show from the MC (even harem mangas wouldn't usually be this willing to isolate the MC just to introduce the author's fetish of the week) and the mangaka trying their absolute hardest to soften the blow from a character writing mistake the author baked into the foundation of the story.
If this were a remotely "realistic and gritty" story, like the copers always cry for some reason whenever a writer has their characters do something this asinine, then Sora has just consigned the two girls to be killed offscreen by the hostile gaze - it knows they are allies, and separating creates a loose end; the "realistic and gritty" response is to eliminate the possibility of the threat coming from multiple angles (if the eyes are truly that dangerous), meaning the "realistic and gritty" truth is that Sora is an irredeemable asshole with no real regard for the wellbeing of his friends.
Again... it's just shit, man.