There are many synonyms that can be used to describe someone who is "querulouser", or excessively complaining and disagreeable. Some possible synonyms for this word might include "whiny", "grumbling", "grumpy", "fussy", or "irritable". Other options might include "petulant", "cranky", "curmudgeonly", "testy", or "cantankerous". Ultimately, the best synonym for this word will depend on the context in which it is being used, as well as the particular nuances of the individual's behavior or personality. By choosing the right synonym, it is possible to accurately convey the meaning and tone of the original text, while also adding depth and nuance to the overall message.