Aero Eng may seem to have longer hours than other degrees, but this is when you only consider the hours spent in lectures/labs/tutorials etc. In arts subjects with only a few hours a week, you would be expected to do most of the work in your own time, you would end up doing almost as much work as Aero Eng students. I don't know if there are any degrees which are easy and genuinely have low hours, but if they exist I doubt that employers would have any respect for them.
If you don't like studying, then you should be considering whether uni is for you.