Nobody is saying that we should not be investigating Citadel or Robinhood or the hedge funds. The problem is that people are treating these conspiracy theories as facts and acting on this misinformation. Many people got duped into buying GME at a heavy loss. Others are going to abandon the stock market altogether because they think it's rigged.
I hate to respond to this "rigged" word but the markets are rigged except not in the way you think. If you try to bet on value plays you will never succeed. If you bet on the stocks the hedge funds support, you will succeed. Go against them and your account will just die. Learn to see what they want and that's how you join the house. It's just hard for a regular person to understand that.
