If you describe something bad or unpleasant as never-ending, you are emphasizing that it seems to last a very long time.
例句
...a never-ending series of scandals...一系列无休止的丑闻The spiral of terrorism becomes never-ending.恐怖主义活动没完没了，不断升级。
英英词典释义
Adjective
1. uninterrupted in time and indefinitely long continuing;
"the ceaseless thunder of surf""in constant pain""night and day we live with the incessant noise of the city""the never-ending search for happiness""the perpetual struggle to maintain standards in a democracy""man's unceasing warfare with drought and isolation""unremitting demands of hunger"