I’m a big fan of Hanlon‘s razor, an adage which most of the time you find in the following form:
"Never attribute to malice that which is adequately explained by stupidity."
TIL that there’s a version articulated by Johann Wolfgang von Goethe in The Sorrows of Young Werther which I like even more:
"Misunderstandings and lethargy perhaps produce more wrong in the world than deceit and malice do. At least the latter two are certainly rarer."