The term "became worse" can be better expressed by using its opposite or antonym. One such opposite word is "improved," which means to become better, more efficient, or more satisfactory. Similarly, we can use words like "better," "enhanced," and "upgraded" to express the opposite of "became worse." Another antonym that we can use to convey the opposite of "became worse" is "stabilized." It means to make or become stable, firm, or steady, and hence, helps to convey a sense of improvement or progress. So, instead of using negative language, we can use these antonyms to express more positivity and optimism.