Making friends with a contrarian is a big challenge that I didn't think this manga would actually cover. It's not hard to make friends with people who disagree with everything for the sake of it, but it's definitely exhausting to be around them if that's all they do. If they can get the new girl to be honest when it matters, or at least be more considerate of people's feelings when finding the right words to criticize (rather than insult), the vitriol will not hit as hard. Of course, the Komi-san cast are angels with infinite patience, so it might not make this seem true to real life.
She'll probably be tolerable in the story, but I don't think most of us here will ever like her as a person lmao.