Do you have an example? Your comment seems like an exaggeration, I have never seen any signs pointing to each other from every direction.

Also, I am curious of the justification. Why would anyone place signs that "... are incredibly confusing and often will all point to each other from every direction."

No they aren't. People who say this have never spent a significant amount of time there.

Not only that but Shinjuku is under massive renovation work which makes the signs genuinely outdated at times.