There is something to be said about 'slice of life' story styles. They can create relatable characters that a reader can identify with. Having them work through their problems and accept what can be done and what can't be done can be comforting if, in the end, there is some kind of resolution.
This may be a bias in American tastes as Americans tend to be optomistic and want to see the adventurous soul triumph over adversity. Other cultures don't necessarily share this taste. Many French stories, like The Stranger by Camus, try to shine a light on things left in the dark. These stories are somewhat educational because they emphasize what socio philosophers call 'anomie' or the state of meaninglessness in anything we do. It's almost considered vain-glorious to think that everyone can always overcome the world's brokeness by hard work and courage. Things just are as they are and will always be that way. Other European sensibilites seem to follow this line. Scandanavian film, for instance, encourages a 'best leave it like it is' motto. So the films basically become voyaristic insights into other people's lives. An effort to find commonality among all people so that we don't feel alone in any of our experiences.
We inherit our love of fantastic adventure and epic storytelling from the British where many authors from Shakespeare to Tolkien build these operatic confections of struggle and defeat and sometimes victory after much hardship and some tenderness.
I think there may be a place for the epic and the mundane in our storytelling as this is true in real life. Our lies aren't all drab misery, hopefully. We have truimphs and conquests as well as defeats. Life's a rollercoaster of experiences and to reflect that makes for exciting stories that can actually be reality based.