Antonyms for the phrase "putting good use" would include terms that denote neglect, waste, and misapplication. Words like "squandering," "misusing," and "ignoring" could all be considered antonyms in this context. Other terms, such as "hoarding" or "stockpiling," may imply a lack of distribution or sharing, while "burdening" or "overusing" could suggest a negative impact on a resource or material. Ultimately, the antonyms for "putting good use" would encompass any behavior that fails to effectively utilize resources, materials, or knowledge, and may even actively harm them.