The antonyms for the phrase 'more good-faith' are numerous. Some of them are 'maliciously', 'dishonestly', 'deceitfully', 'fraudulently', 'bad-faith', 'deceptively', 'insincerely', 'misleadingly', 'untruthfully', and 'treacherously'. Each of these words depicts a different characteristic that is quite the opposite of 'good-faith'. These antonyms can be used to describe situations where individuals act unethically, untruthfully, or with malicious intent instead of acting in good faith. In contrast, using the phrase 'more good-faith' signifies that the individual acts ethically and honestly, which is crucial in maintaining positive relationships with others.