What is all this console spew, and how to manage it?

Something (or a lot) is janky about apps built for "My Mac - designed for iPad."

Aside from things just not working, the amount of garbage spewed to the console during debugging is unmanageable. I can't see my own trace statements amongst screens and screens of repetitive nonsense.

I right-clicked on it and set it to filter out errors, but I'd like to get notified of legitimate errors. Anyone employing a clever filtering method I'm not aware of?

What is all this console spew, and how to manage it?
 
 
Q