It's generally accepted by anyone who has looked into it thoroughly that Trump tells lies at a rate that is vastly in excess of anything Clinton managed. In the first debate, Trump is considered to have made something like five or ten times as many inaccurate, misleading or downright false statements as Clinton did. So disputing the claim that Trump is "more so" is, at least, on shaky ground.
I agree that Clinton isn't squeaky clean, though. There are a number of reasons I'm troubled by her candidacy for reasons that aren't anything to do with her per se either -- for example, how can it be right that (before Trump stepped in) there was a strong chance this would have been a Clinton v. Bush election race? Jeb Bush, this time around, but then that would have made 24 years since 1988 where the leader of the most powerful country, and self-styled head of democracy, was drawn from one of two families. This can't be held against Clinton personally, but still it's not ideally democratic is it?
She's also a bit too much of a politician and represents certain excesses or problems with the system that we could do without. And yes, she does lie, and has often totally changed her positions on many topics probably because it's politically convenient to do so rather than out of a genuine conviction that she was wrong before.
But all that said, Trump answers none of these problems. Tired of lying politics? Trump lies to absurd degree? Sick of insiders running the system? Trump was an insider himself, for many years (and if you don't believe me, ask him yourself, as he freely admits to this -- with the caveat that he then claims this makes him uniquely suited to fixing it, if you believe that). Sick of the wealthy avoiding taxes and abusing the system? Trump again... (even more so outrageously as he complained about everyone else dong it).
He's tapped in to an anger about the current state of affairs very well, but his supporters are bound to be disappointed either way.