There is no one answer to this question, as it depends on what you mean by worse. For some people, a year in which there are mass killings or natural disasters would be considered worse than one in which the economy is doing poorly but there are no major events. For others, years with widespread poverty and social injustice might be seen as worse than ones in which the economy performs well but there are also problems.
There is no definitive answer, as each person's feelings about different years will likely be quite unique. However, HuffPost rounded up 10 of the worst years in human history based on a variety of factors, including deaths due to war and disease, economic strife and famine, displacement and political unrest.