Twitter released its most recent quarterly report on Thursday, accompanied by an announcement of a $400 million share buyback, provoking market ambivalence that has some investors doubting the company’s future success. The new quarterly report, the first since Parag Agrawal stepped in as CEO of Twitter last November, revealed underwhelming metrics for revenue and user growth, disappointing those who had hoped that the new leadership would see immediate success in key business metrics. Recent months have been tumultuous for the social media network, which has undergone significant changes in the wake of founder Jack Dorsey’s departure as CEO. Agrawal has made his presence known with a prompt and ambitious roster of changes, some of which have provoked criticism. Within weeks of his appointment as CEO, Agrawal presided over a new content moderation policy, which some consider significantly more censorious than that of his predecessor. The immediate impact was a wave …