Antonyms for the word "more perfecting" would include words such as "imperfecting," "flawing," "ruining," "weakening," "damaging," "hindering," "hampering," "impairing," "disrupting," "distracting," and "interfering". These antonyms suggest a lack of improvement or progress towards perfection or even a regression towards a state of imperfection. They highlight the negative effects of a lack of perfecting or the presence of mistakes and flaws. It is important to understand these antonyms in order to understand the impact that a lack of perfecting or the presence of flaws and mistakes can have on a project, product, or individual.