How about kettles? A container that whistles when your water boils. The never-ending list of errors: handles that are in the wrong place, whistles that don't whistle, underside heat distribution plates that come apart, lids that become wedged tight. After the centuries we've had to perfect kettles, you'd think a reliable design could have emerged by now.

Can’t wait till we can mass produce open sourced objects. E.g. 3D print on demand a kettle

I'd like to pre-order! Make mine this one: https://en.wikipedia.org/wiki/Utah_teapot