Does Arthur Miller portray Abigail Williams as a character to be sympathised in the play The Crucible?Should the audience have sympathy for her?...

No, I don't believe Abigail is a sympathetic character
and, in fact, I think the audience grows to despise her actions and manipulations of
others throughout the play. When she steals away under the cover of darkness near the
end of the play, I think most readers probably silently celebrate that she is gone and
some probably wish for some evil to brought onto her for the evil she has brought onto
the people of Salem.

Throughout the play, Abigail thinks
only of herself. Her manipulations of others are all contrived to help her gain that
which she selfishly seeks. Whether it is the seduction of John Proctor, her manipulation
of the other girls and the court, her betrayal of Mary Warren, etc, we see a long line
of immoral and criminal acts against her community. Many, many times Abigail had a
chance to acknowledge her mistakes and begin to reverse the damage she had. She refused.
And because of this, I think there is no excusing her actions.