You are really reading way too deep into all this. And all this is because you can't get over the discomfort you are getting from reading this 'arc'. Thus you are trying to force your own ideals of how this manga, that appealed you at first but now made you feel disappointed/betrayed should be, and judging the author decisions as wrong or bad because of that. You try to make it seem as if there is some fundamental literary flaw when in reality it's all about that discomfort that you felt.
As
outinthegardener said this manga is both satiric and dramatic, it doesn't take itself 100% seriously and thus some events and character's decisions are plot driven, in order to carry the story to certain places where it would be (according to the author, probably) engaging and fun.
Netorare vibes when used lightly (as it's going to be the case for this manga, apparently) are there to create tension and conflict, to raise the stakes and increase the investment of the readers who may find themselves cheering and expecting for the 'good' ending or satisfactory development even harder after 'facing difficulties'. This is both ancient and basic: artists evoke both negative and pleasant emotions in order to move the spectator, to carry him as far from indifference as possible, it's the McGregor effect.
If you want an easygoing light romance with no emotional roller coaster you should go to this same author's previous work. But I would advice you to grow up and deal with it so you are able to enjoy this awesome manga as it is. ^^