I have found that a nasty hive is usually the best producer, however.  All you
need to do is requeen and in a few weeks things will change with the birth of
your new stock.
 
It's better to go into the winter with the hive, even if you can't manage to
deal with their behavior.  Your still one hive ahead after any winter losses.
In the spring they will be weaker and gentler.  You could always requeen at
that time too.
John
CT