Like the title suggests, pay attention to all of the reviews because they are not lying or exaggerating. Nothing will change at Jive until there is a change in upper management. Concerns about upper management have been brought to the CEO's attention time and time again but nothing has been done as there are personal relationships at play.
As soon as employees begin to demand fair compensation for their time and effort, and for the way they are treated as a result of not being able to deliver (to no fault of their own) on what has been promised to clients, Jive finds a way to weed them out of the company.
There is a laundry list of issues myself and others have experienced during our time at Jive but there is no point in going through them as, again, nothing will change while current management is in place.
Save yourself the physical and mental breakdowns and find work at other agencies/companies.