So for the last few weeks, I've been doing a few courses (all in the name of research of course). Two are on Happiness - (A Life of Happiness and Fulfilment and The Science of Happiness), and the other is on Resilience. (Through Coursera and Edx). All are excellent courses and highly recommended.
In all the courses they talk about how humans are naturally wired to seek the 'bad' or negative in circumstances - it's a life saving strategy (noise in the bush - better think it's a lion rather than a bird, rather being the other way around). However, clearly it doesn't always serve us well in the modern world