"More pear-shaped" is a common phrase used to describe an object or situation that is becoming increasingly difficult or problematic. However, there are several alternative synonyms that can be used in place of this colloquial expression. For instance, one could use phrases such as "going awry," "turning sour," "off track," "derailing," or "becoming disordered." Other synonyms could include "troublesome," "disruptive," "chaotic," "difficult," or "unstable." Each of these words paints a different picture of the situation at hand, providing the reader or listener with a unique perspective on the issue being discussed.