Most of the harm from ISP misbehavior is the manifestation of one of two perverse-incentive situations:
- integration of an ISP into a content-provider megacorp, leading to penalization of competitors or other perceived threats to the larger content-providing component.
- an under-competitive market situation (monopoly, duopoly, other under-four-competitors) situation, allowing ISPs to provide less than they promised or less than what is expected of "internet service" without a "vote with their feet" option for customers.
Both of these are not internet-technology issues and both are things the FCC handles poorly, and which are outside its mandate. They're better handled by such agencies as the FTC and DOJ, under antitrust and consumer fraud models, than by the FCC.
With respect to the content-provider/ISP vertical integration issue: Trump has already come out opposing the ATT/ Time-Warner merger. Additionally, the mainstream media's pile-on against his campaign has left him with no love for the "content providers". I'd be willing to bet that he'd be all for antitrust action to split up the other ISP ("content transport") / news reporting ("content generation") partnerships under the rubric of "breaking up anticompetitive vertical integration". B-)