Hanlon's razor:
Never attribute to malice that which is adequately explained by [ignorance or] stupidity.
From an interview with Andrew Wilkinson on My First Million. Andrew added the ignorance part in the podcast, which I think is a nice addition there.
Q: What steps do you take to achieve your best work?
A: I’d say focus and deep work (read Cal Newport if you haven’t). If I give myself 5 hours at a desk to do something important I will get it done. It sounds so simple but once you can work deeply and consistently you’re impossible to compete with.
From an "interview" with Jordan Hughes on Twitter