They've also made a big deal about Trump's lies and Bush lying us into war. Democrats are hilarious when they claim Bush was a war criminal and then elect one of the most dishonest politicians since Tricky Dick to be their standard bearer.
One of the reasons Clinton is viewed so negatively by people is people expect politicians to lie about their opponents. It's part of the game. What bugs people are lies that are told for self-aggrandizement (dodging sniper fire, leaving the White House "dead broke"), lies about things that are obviously true (what, the FBI said I was truthful!), and lies to get themselves out of hot water (hey, other SoS's had private servers, my email practices were approved, all my deleted emails were personal).
Clinton lies reflexively and repeatedly. It bothers people. It's going to make it hard for her to enact her policies.