Well, the mistakes were quite bad and Lyford doesn't seem to think that he was responsible for them. In this case he tried to blame everybody else. If he hasn't learned anything from his past mistakes, why we should trust him now?
And these weren't only just some normal business mistakes that everybody makes. He tried to intentionally deceive investors by manipulating the market price. That is highly unethical behavior, don't you think?
RE: The case of Banx & C-CEX