Are all contract jobs terrible?

I recently graduated and my goal is to pass the civil service exam next year. During the time until the exam, I was thinking of applying for government contract positions. I heard from others that government contract jobs have a huge workload and are filled with tasks that others don't want to do. They say civil servants dump their work onto contract employees, leaving no time to prepare for the exam. Is the current situation really that terrifying? I'd appreciate it if experienced seniors could share their experiences~ Thank you all.