I don't think it's a problem with the shipping when it comes to how poorly Erina's character had been handled. She and Soma can end up togther and that all fine and dandy, the relationship could have always worked with Erina being a chief antagonist, but fact of the matter is that the path Tsukuda decided to take to get here is bonkers.
Rather than Erina admitting that Soma wasn't a pleb who needed to be kicked out of the school for pity reasons, she is this cold and illogically vindictive because her dad used to take her to a dark room and abuse her into doing what he wanted. And because her grandfather is a moron, he never did anything but waited to see if some random kid would come along and heal the psychological damage her father left on her.
I don't think, for the problems Nisekoi had, that Komi ever threw Chitoge's character under the bus like that. Erina went for a string of chapters being a scared little girl afraid of what her dad might do to her.
Then again, she has her fans still. And at least she's not gloomy any more, because she realised Freedom for Chefs is important and she has lots of friends now. I don't think this was the way to go about it to make her like that, but that's me. Maybe Erina fans have their reasonings for liking how this arc handled this change.
