I've lost count of how many times I've googled a question, had the first hit be SO, and the top answer to the question be "Have you ever heard of Google, n00b"? (Thread locked).
Stack Overflow is like democracy. It sucks sometimes, but it's still better than everything else we've come up with so far.
I often ddg problems related to Ubuntu. I had many encounters where someone had the same problem than me on askubuntu, but the answers where unhelpful, sometimes only the question was posted with no answer at all. Or the original poster stated he solved his problem, without posting the solution. In most cases, on SO I found relief.
Then there's also the conceit that SO has hit upon a definition of what a good technical question is (or, more specifically, what isn't a valuable technical question), and they stick to it despite any evidence to the contrary. I've seen questions that fail their over-restrictive criteria that have far better answers than many that do.
Unless it's something to do with Skype or Lync. Then it's abandon all hope, ye who enter here.
You can always appeal to get a question re-opened. You can see who voted to close it and then send them a message.
The worst place for things getting closed is Skeptics SE, but that's a hotbed of controversy and the moderators on there deserve danger money.