This is a cliché but honest answer — I was using a similar tool and thought to myself “man, I could make something better than this.” I have this impulse a lot, and usually I stop myself from actually following through (there is always so much complication hiding below the surface!) but I kept coming back to it.
Eventually, I set a deadline for myself; I said if, six months later, I couldn’t scratch the itch to make something better (or at least find something better) than what I was using, then I’d start working on it.
The six months passed, and so it was born: