When it comes to the phrase "atrocious execution," there are a variety of synonyms that can be used to convey a similar idea. Words such as terrible, appalling, dreadful, and abysmal are all reasonable substitutes. Other options might include words like ghastly, disastrous, woeful, and wretched. Each of these words can be used to describe a situation where something has been executed in a manner that is unacceptable or subpar. By using a range of synonyms for "atrocious execution," it is possible to convey a more nuanced understanding of a given situation and ensure that readers or listeners are left with a clear impression.