You weren't ripped off. Explain what you paid for that you didn't get?
You weren't lied to. Explain what Bungie promised you that they didn't deliver on?
You weren't overcharged. Millions of people bought the content at the asked for price. You weren't required to buy it. You had a choice. It was up to you. You may have decided later that you don't think the content was worth the price, but prices aren't set by individual preference.
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I paid for a complete game and got a -blam!-ing beta! That's what I called being ripped off!