Finding synonyms for the phrase "was at the bottom of" requires an understanding of its intended meaning. This phrase often refers to something negative or problematic, indicating that the root cause or source lies at the bottom or foundation of a particular issue. Some synonyms for this phrase may include "responsible for," "caused," "instigated," "sparked," or "triggered." Other potential synonyms might emphasize the notion of uncovering or revealing the underlying issue, such as "discovered," "disclosed," or "brought to light." Understanding the context and intended meaning of this phrase can help identify appropriate synonyms that convey the desired message.