The rules not being enforced really is 4chan's worst problems, and where everything else terrible on that site stems. On /g/, the tech board, you will see nothing but flame wars and troll posts for/against various operating systems and programming languages. Its basically nonstop trolling DESPITE being one of the more serious boards. Worse, a lot of the "jannies"(unpaid tattletales) are in on the trolling and actively make posts to start flame wars.

For the admins, its a problem. Besides 8kun, they are pretty much the only major image board with anything really going for it, especially now that 420chan has bit the dust. However, if they enforce the rules, its very likely that people will either stop using it entirely or move on to 8kun instead. For the janitor problem, 4chan relies almost entirely on them to report posts that break the rules to the admins, but since its on a volunteer basis, janitors have no reason to take the role seriously which has led the site to be the gutter it is now.

Basically, the whole 4chan system is screwed. I used to go to 420chan as an alternative because it was way more "chill" and there was way less racism and trolling due to it having actual moderation. Now that its gone though my only choice for imageboards are 4chan and its much worse brother, 8kun so I have decided to stop using imageboards entirely until something decent gets started.