No, without us winning the war for the rebels they would have been wiped out by government forces. Things would never have got as bad as they did and today it would be as it was before the uprising.
Suppose it depends on your view of bad. Dictator killing many of his own people to spread fear in order to remain in power with no end it sight.
Taking out dictator to give them atleast half a chance to bring democracy.
Whilst it never had the fairy tale ending (which was very unlikely, true) it's not our fault they squandered it, no matter how unlikely it was.
One of the main reasons I feel the west should stay out of African / Middle Eastern affairs. Let them blow each other to pieces till they see sense (which they will one day)