Why do people insist on correlating poor IPO performance with a company that somehow messed up? We keep seeing this with Zynga and Facebook too. These companies

Why do people insist on correlating poor IPO performance with a company that somehow messed up? We keep seeing this with Zynga and Facebook too. These companies didn't mess up, those that invested in the stock did. I'm not saying Groupon is doing well, but to suggest that they should have just sold to Google here is wrong; they still got their payout (the IPO) and they still have their company to boot.