The end of this exchange was due to the fact that it couldn't be resilient to attacks that came at it's servers. Dagx live is said to be one of the highest victim of cyber attacks of any crypto exchange. They usually lost control of their frontend web server and this allows the hackers to mislead users into making wrong transactions thinking they were interacting with the exchange itself. This wouldn't have meant much but due to the fact that this happened several times, its closure was predicted and called for.
Security was one thing Dagx live lacked and this was the major reason to why it couldn't stay up for long ending it's service in the very same year it opened it's exchange doors to the public. Other exchanges should be a good use with the closure of Dagx