Yes, that's true.
Lying to the public about his job (e.g., things he's done while in his capacity as President, aspects of pieces of legislation he champions, etc.) I would consider to be "important lies." Iraq WMD was an important lie. "If you like your doctor you can keep it" and how ACA was sold was an important lie. Lies about inaugural crowds (he isn't even in a position to cover that up) or how much money he's donated to charity are lies, and lying is wrong, but I don't really consider to be important. The vast, vast majority of stuff Trump has lied about is over stuff like that.
As
@FLVOL_79 said, Trump is the epitome of a bullsh***er. They exaggerate and play fast and loose with facts but do it in a way where you know they are exaggerating and playing fast and loose with facts. He exaggerates, but he knows that you know he's exaggerating. Purposely vague with details and promises unclear and abstract but "great" things, and leaves you to fill in the blanks with your imagination.
Trump is a New York real estate developer who was a celebrity/reality TV star before entering politics. It isn't shocking he behaves this way. To become all indignant and uniquely outraged, as if people who have held this office in the past would have never even considered doing/saying some of the things Trump has, is just kind of silly.