Job satisfaction is very important and should be considered when looking to take a new job. There are many factors that contribute towards job satisfaction and some are more important than others. For many people, money and working hours are the top priorities. They are happy to work longer hours under conditions that they are not too keen on if the pay is right. This should not be the deciding factor but unfortunately it often is for many.
You can sometimes improve your own job satisfaction but making your working day easier. It may be that you are not very organised and therefore simple tasks are taking too long. Maybe by staying later one night or coming in for one day over the weekend will give you time to sort out your working environment and get back on top of your work. You can then put procedures in place to make tasks quicker to complete on a day to day basis.