If it was planned to this extent and she really still stands by it, then well, there’s nothing left for me to say. It’s nothing new that Airi is terrible at writing. But she vastly overestimated herself. She probably thought the majority were Karami fans—otherwise, she wouldn't have made such an idiotic move. And how did we go from 100 chapters of bait to a 20-chapter buildup for pure NTR—which was actually poorly done and isn't even considered NTR by many? As an NTR lover, she ought to know what NTR actually is.
I wouldn't call Airi a bad writer per say. She did something right for the Entanglement series and spin offs to be as successful as they've become.
And honestly GraPara! has it's entertaining moments. Even with the all the baits. I was enjoying it.
But this last "Love Triangle" arc (seriously it's nowhere close to that) was just handled poorly. The only time we see Yuma actually go out of his way for Sakura was back when she lost her necklace (which is a pivotal item that can't just be forgotten about between Sakura and Shinobu).
It should have been more slow cooked. Actually have him save Sakura from situations much like Shinobu has. Actually let us get to know him and what he's like. I've said it before but seriously. 100 chapters was what it took to for Shinobu to finally have sex with Sakura.
Yuma stole her in 20ish chapters with literally little effort. That's just what pisses me off most. Sure, add a love triangle.. but dude this wasn't a love triangle.
Given Airi has made decent endings for her stories so far, I am a little optimistic that she can at least make a "good enough" ending for GraPara!