That yandere is clearly bullying the MC, and at the same time, she's kind of trying to isolate the idol (the idol seemed to feel hurt to be ignored by MC). I'm not surprised that a yandere is trying to keep her love interest all to herself, but you really want to ship MC x Yandere when she's abusing psychologically our MC?
Nopenopenopenopenope and nooope for me xD