Trump and Clinton most unfavorable candidates in 30 years? How could the parties have yielded more favorable candidates?

I view one of those candidates:  EXTREMELY  UNFAVORABLE!  Google: “Hillary Clinton admired” to see the publications that hailed her: “Most Admired woman in the ENTIRE WORLD” … 17 years out of 18; Barack Obama was rated “Most Admired man” 7 years in a row!    The opposition party saw “their need” to strongly diminish her reputation!  The “Hillary Haters” and distrusters are the direct result of concerted, sustained efforts of mainly taxpayer-funded bogus attacks and hearings by “Rethugs in Congress”, hate radio, extreme-rightwing publications, and notorious propaganda-entertainment that bills itself as a news station.  The Democrat party put forth 2 great candidates:  Senator Sanders had a “UGE” following.  Those of us FOR HILLARY are enthusiastically confident in her experience and abilities to govern and represent us on the world stage!  The Republicans ran 16 candidates, most of which I thought were poor choices, with the exception of John Kasich; sane, respectable, reasonably-truthful, why did he garner such limited support? Why did such a DEPLORABLY-UNFIT candidate appeal to so many?  He has appealed to the lowest common-denominator in our society!  That is a sad commentary on America!  Good thing — he’s plummeting in the polls!