Original sentence: The mall has been left to decay ever since, due in no small part to a lack of funds (the town of Harvey owned the property itself for the greater part of the last 25 years), political incompetence, general mismanagement and apathy
Edited sentence: The mall has been more-or-less left to decay ever since, due in no small part to a lack of funds (the blighted town of Harvey owned the property itself for the greater part of the last 25 years), political incompetence, general mismanagement and apathy