What happened to Citigroup?

I'm genuinely curious. I understand about what happened in 2008/2009, however why have their stock price not gone back up to the highs it once had?

https://www.google.com/search?q=citicorp+stocm&oq=citicorp+stocm&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIMCAEQABgNGLEDGIAEMgkIAhAAGA0YgAQyCQgDEAAYDRiABDIJCAQQABgNGIAEMgkIBRAAGA0YgAQyCQgGEAAYDRiABDIJCAcQABgNGIAEMgkICBAAGA0YgAQyCQgJEAAYDRiABDIJCAoQABgNGIAEMgkICxAAGA0YgAQyCQgMEAAYDRiABDIJCA0QABgNGIAEMgkIDhAAGA0YgATSAQg0ODEzajFqN6gCALACAA&client=ms-android-verizon-us-rvc3&sourceid=chrome-mobile&ie=UTF-8

This is my first time posting here. Give me some slack.