You make a good point. The fall of Milo did more to damage the alt-right and the asshats who follow him than any external force ever could have. He was built up as the acceptable face of it, the likeable and funny guy with a sophistic answer for everything, which just made his fall even harder and more devastating for the movement he was figurehead of.
It's hard to imagine what the next four years will be like with Trump. Having failed at basically everything so far, with little prospect of getting much done in the foreseeable future... Will he eventually be worn down and sidelined while others do the work, or will he keep the pantomime going until people just start to ignore it?