Business doesn't always have to run smoothly. There is also the push for expansion (revenue) that's shakes things up. Then it's up to the company to smooth it out for the next push.
Too many employees take a back seat saying it's not my responsibility. But being able to take lead on expansion and smoothing it out will give you the skills needed to be successful in business later on. The rest are there to push papers to collect an income - yet you cannot grow from this point alone.
Yes, your job is meant to help ease the paperwork of your boss. If you don't help them, then what's the point of your role.
You should also consider your working hours and pay. Those are two elements to take into consideration. Moving into a new company brings new risks, uncertain management, hours, how others in the team will treat you, etc. Many people left a job for a worse one--so look at the whole picture and have a positive mindset while you are there. Otherwise you'll be just another miserable sad person.