That only counts positives, so it's biased towards whoever is most famous, even if they're controversial. Take a look at this instead: http://www.realclearpolitics.com/epolls/other/clinton_favora...

Yes, when Trump ran his negative campaign, Hillary's favorables declined. Cause and effect.

In fact, using your own cite, if you run that back to 2015 and before and she has net favorables. The only thing you've shown is that negative advertising works.