Having no declared opponent is no excuse for running an inactive campaign. I was a candidate for the Mideast Assembly on three separate occasions in 2015; in each of those elections, the number of candidates for office was fewer than the number of seats, meaning that I was effectively running unopposed. The same was true when I ran for my third and final term as Senator At-Large in April. I could have won those elections without any effort at all, but instead I chose to run an active campaign - publishing a detailed platform, making speeches, etc. - because I knew then, as I know now, that activity is the lifeblood of the game. (I did this while continuing to tend to my official responsibilities, by the way.) Your explanation - that you didn't campaign because you didn't have to - shows that you do not understand this simple truth.
This is a critical point considering how dead the AFE board has become as a result of so much discussion being transfered to various Mibbit chat rooms. Public campaigning is a critical thing that has to be restored, and it is one of the many reasons I structured my campaign effort the way I did.
I was often unopposed as Southeast Regional Senator, but I always campaigned publicly for the post regardless. And typically had some major inconvenience to contend with each time from computer failure, to income loss, to a death in the family. Trouble seemed to always be timed at the end of a January, May or September, just in time for the usual commencement to the Feb/June/Oct election cycles.