Michigan results are slightly underwhelming for Trump no, more than Biden. I think Biden did pretty well and if that uncommitted number is holding to around 12-13% its not bad. I look at it as more of an opportunity for Biden campaign to win those voters back (and there is no reason to think he wont be able to convert some of those voters back!) but it feels like Trump has a tougher job ahead in Michigan than what it looks like and him winning over the entirety of that protest vote is still not going to help him much (which is doubtful anyway).
Of course I am very excited about NYTimes hot take on why all of this is such a disaster for Biden.