The phrase "disappointing year" refers to a period of time, typically 12 months, in which one feels let down or unsatisfied with the outcomes or results of various events or situations that took place during that time. Full definition
Known for always making the most idiosyncratic picks of the awards season, they sure don't disappoint this year. (awardswatch.com)
I have been disappointed year after year, as it never came to fruition. (nomadictexan.com)
In fact, I'm disappointed this year because my net worth only increased about 3 % using my trading strategy in the first quarter of 2017. (morpheustrading.com)