4Chan is perfectly fine I visit the /v/, /po/, and recently /tr/ boards daily. It's /b/ you want to try not to make a part of your life. /b/ is fine in small dosages but once you feel you're becoming desensitized to CP and gore then you should take a rest from the board.
Edit. I also visit /lit/, /toy/, /g/, /tv/, and i occasional annoy /fa/ by talking about how cool fez's are. ( yes thats a doctor who joke)