The MSM was perfectly fair to the 16 candidates running for president on the Republican ticket! The problem was there were too many of them--no one had time to answer any of those questions with more than a sound byte. I think the Democrats already have too many candidates and before the debates, I hope it's down to no more than half a dozen.
If you go back and carefully listen to those debates, almost all of the questions asked the Republicans had a 'gotcha' component to them. They did NOT do that to the Democrats.
Even Fox News, via Megyn Kelly, did that first rattle out of the box with President Trump and she and Bret Baird did more 'gotcha questions' or encouraged confrontation between the candidates than they encouraged the candidates to actually express their opinions about real issues. The Democrats refused to accept a debate hosted by Fox News so we don't know how they would have addressed that debate.
I do remember Kelly's 'gotcha question' to Trump--no question there.
I don't remember ANY others to the other candidates, though.
I heard lots of opinions about "real issues" but yeah, with sixteen candidates, some are going to disagree and there was actually quite a bit of mud slinging amongst them, so the arguing, while annoying, was certainly understandable.