First of all you were not promised anything. Maybe is this just your imagination or lack of knowledge or information but who do you think exactly made some promis to you?
Bitcoin still is decentralized cryptocurrency, no matter what some conspiracy theories say. Yes, whales have some influence on the market but you can't blaim them for everything that is happening on the market, like the latest dump.
I know that bitternes is talking out of you but try to be rational and don't blaim Bitcoin or others for bad decisions or losses that might have happened to you.