The antonyms for the phrase "more sportspersonlike" are "unsportsmanlike," "ungentlemanly," and "unfair." These words describe qualities that are the opposite of the positive attributes associated with being a good sportsperson. An unsportsmanlike behavior involves actions that are disrespectful, dishonest, or mean-spirited towards opponents. An ungenteel behavior refers to a lack of courtesy, politeness, and consideration towards others. Lastly, an unfair behavior pertains to actions or decisions that do not conform to the rules or standards of sportsmanship. It is essential to exhibit sportsmanlike conduct in any sport or activity to promote respect, fairness, and inclusivity.