Collocations for unbalanced - adj.

be, seem
become

a little, slightly, etc.
emotionally, mentally
She became mentally unbalanced after the accident.

be, seem
become

extremely, fairly, very, etc.
a somewhat unbalanced account of the events

dangerously, seriously
The stock-market boom is dangerously unbalanced.

completely, wholly
The report is completely unbalanced.

a little, slightly, etc.