When it comes to describing a bad combat, there are many synonyms to choose from. Some of the most commonly used include "ineffective," "poor," "unsuccessful," and "botched." Other options might include "disastrous," "failed," "flawed," or "unsatisfactory." For a more dramatic description, words like "catastrophic," "dismal," "wretched," or "debacle" may be used to emphasize the severity of the combat's failure. More neutral synonyms might include "subpar," "unimpressive," "mediocre," or "unspectacular." Regardless of which word is chosen, all of these synonyms suggest that the combat in question was not successful and could have been handled better.