To me your feedback doesn't seem fair and not thought out well though. Notes/Calendar/Todo apps will evolve forever, there is no one size fits all and there won't ever be.
Which is exactly why they are A waste of time. I have yet to meet a developer that doesn't have an idea for a notes/calendar/organizational tool. The point is that organization is such an individual problem that it always needs a custom solution and yet each solution will only be valuable to a handful of people.