Romney is just PO’d that Trump didn’t lose with quiet dignity like he did. Romney has wanted to be president for a long time, when he had his chance, he blew it. Then he begged Trump for a job.
It appears to be pure jealousy on Romney’s part. Otherwise, Romney would be more angry at the bogus allegations we spent two years and millions and millions of dollars on - moreover could call out the Democrats on their lies and hypocrisy on Russia - remember during the 2012 campaign, Romney said Russia was a threat, and lampooned by Democrats and the media as stupid for suggesting such a thing - Russia is no threat, etc. - then the exact same media figures and politicians who blasted him for saying Russia was a threat did precisely the opposite - saying it was stupid to suggest Russia wasn’t a threat and that everybody knows it. Romney had a huge opportunity to do that to rehabilitate his own image and call these people out for their dishonesty - could have gotten himself a lot of positive creds for it, and instead, chose to attack Trump out of personal bitterness - now how absurd is that?