None of the charges, none of the references to 'possible blackmail' or the 'Logan act' (a 1799 obscure rule, that has never been prosecuted), none of the allegations screamed at maximum volume prove any intentional misdeed or wrongdoing by Mr. Flynn, who did the honourable thing and resigned out of respect for his boss and the office he holds.
This has absolutely nothing to do with Russia; except that said country is a convenient lightning rod in American politics and always has been going back to almost the beginning of the United States.
Sad, really..