I'm no fan of Zuck, but what did he do in this case but create a company that provided a lot of jobs, then made some bad forecasting decisions that resulted in losing some of those jobs?

Plenty of CEOs have blamed the economy, the pipeline, the customers, the competition, the weather, etc. He's accepting he made some decisions that over-extended the company and as a result they have to make difficult layoffs. (Which has happened at every company I've been a part of and is happening at many other companies just in the past week.)