The antonyms for "more self-willed" include cooperative, submissive, obedient, compliant, docile, amenable, and pliable. These terms describe people who tend to follow instructions, respect authority, and are willing to compromise or negotiate. Self-willed individuals, on the other hand, often resist authority, insist on their own way, and reject any suggestions or feedback from others. Thus, while being self-willed can sometimes be helpful in achieving personal goals, it can also hinder teamwork, compromise relationships, and cause conflicts. Therefore, developing a more amenable and cooperative attitude can be beneficial in many situations and help individuals thrive in diverse settings.