Why do film adaptations of video games usually do so poorly?

It seems as though most movies based on video games usually do very poorly at the box office. Why do you think that is?

Why do film adaptations of video games usually do so poorly?
Theyre making another one by the way, animated this time. And with Chris Pratt playing Mario, for some reason...
They're making another one by the way, animated this time. And with Chris Pratt playing Mario, for some reason...
Why do film adaptations of video games usually do so poorly?
Why do film adaptations of video games usually do so poorly?
Why do film adaptations of video games usually do so poorly?
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