Never thought about leaving myself, but the widespread negativity on this site makes me realize why others would consider it. It's easy to stay away from topics regarding consoles and companies that you never intended to support anyway. But apparently some people prefer hating on fans and products of their favorite company's rivals, and spread their negativity in hopes that Playstation fans will buy Xboxes and Xbox fans will buy Playstations, etc. That, or they are having a hard time convincing themselves that they have made the right purchase(s). Either way, it's pathetic.
Thankfully, these users tend to get banned on a regular basis. Though there are a few exceptions.