Here's a thread of stories that have come out during Julie Payette's three-year tenure as governor general. Not everything here is scandalous or her fault, but the sheer range of it is really something. And most of it points to the lack of thorough vetting before her appointment.
July 18, 2017, iPolitics: PMO has no comment on Julie Payette’s expunged 2011 assault charge (This is six days after Payette's appointment is revealed) https://ipolitics.ca/2017/07/18/pmo-has-no-comment-on-julie-payettes-expunged-2011-assault-charge/
July 19, 2017, Toronto Star: Future Governor General Julie Payette involved in fatal collision months before assault charge in Maryland https://www.thestar.com/news/canada/2017/07/19/future-gg-involved-in-fatal-accident-months-before-assault-charge-in-maryland.html
Aug. 21, 2017, National Post (I picked my story, but there were many): Julie Payette drops legal battle to seal public records of her divorce proceedings https://nationalpost.com/news/politics/julie-payette-drops-legal-battle-to-seal-public-records-of-her-divorce-proceedings
Nov. 2, 2017, Canadian Press: Julie Payette Speech Mocked People With Religious Beliefs, Critic Says https://www.huffingtonpost.ca/2017/11/02/julie-payette-speech-mocked-people-with-religious-beliefs-critic-says_a_23265177/
Aug. 27, 2018, Globe and Mail: Governor-General Julie Payette delays move into Rideau Hall (this was the start of a drumbeat of stories about trouble at Rideau Hall) https://www.theglobeandmail.com/politics/article-governor-general-julie-payette-delays-move-into-rideau-hall/
Sept. 12, 2018, Globe and Mail: Governor-General at odds with RCMP over security issues https://www.theglobeandmail.com/politics/article-governor-general-at-odds-with-rcmp-over-security-issues/
Sept. 19, 2018, Winnipeg Free Press: Governor General's first year won't include Manitoba visit https://www.winnipegfreepress.com/local/governor-generals-first-year-wont-include-manitoba-visit-493780261.html
Sept. 20, 2018, Globe and Mail: Governor-General’s review of patronage activities leaves charities in limbo https://www.theglobeandmail.com/politics/article-governor-general-julie-payette-leaves-charitable-groups-guessing-about/
Sept. 22, 2018, National Post: Inside Julie Payette's turbulent first year as Governor General (this was the ridiculously long story from me and @mariedanielles based on confidential sources at Rideau Hall) https://nationalpost.com/news/politics/failure-to-launch-inside-julie-payettes-turbulent-first-year-as-governor-general
Sept 28, 2018, CTV News: Gov. Gen. Julie Payette addresses 'missteps': 'I don't pretend to be perfect' https://www.ctvnews.ca/politics/gov-gen-julie-payette-addresses-missteps-i-don-t-pretend-to-be-perfect-1.4114540
Sept. 27, 2018, National Post: Julie Payette doesn’t plan to preside over 2018 Governor General's History Awards ceremony (oops, this one was out of order...at any rate, she eventually changed her mind) https://nationalpost.com/news/politics/julie-payette-wont-preside-over-2018-governor-generals-history-awards-ceremony
Jan. 12, 2019, National Post: Julie Payette's first year as governor general: critics say turbulent, she says 'quite a ride' (this was the lesser-read follow-up from me and @mariedanielles on how Payette both had and hadn't changed since the fall) https://nationalpost.com/news/politics/payette-story
July 3, 2019, CBC: Gov. Gen. Payette won't be moving into Rideau Hall for now (the reasons have always been mysterious; it seems Payette just likes the privacy of Rideau Gate better) https://www.cbc.ca/news/politics/payette-rideau-hall-move-1.5192368
July 4, 2019, Maclean's: Unhappy times at Rideau Hall (about the fact staff there were reporting a bad working environment) https://www.macleans.ca/politics/ottawa/unhappy-times-at-rideau-hall/
And a year later from CBC: Gov. Gen. Payette has created a toxic climate of harassment and verbal abuse at Rideau Hall, sources allege https://www.cbc.ca/news/politics/julie-payette-governor-general-harassment-allegations-1.5657397
I've no doubt missed some things.