Even less data is being used for ads than when you worked there - Gmail is no longer used, Photos doesn't use them, Android doesn't except insomuch as the Google search bar exists on the home screen, Maps barely has ads...
Any evidence of that? Enterprise GSuite is not supposedly used, but consumer Gmail not feeding into ads would be surprising to me. Android feeds location and contacts data.
maybe you're using a different version of maps than I am, but I just downloaded it and the first page is chock full of ads, it begs me to turn on search history so it can show me "more relevant results".
it's also full of dark-patterns like if I click "commute" in the settings, there's no back "<" like there is in most views, but there's a nice blue "turn on" and a grayed out "no thanks".
hell, when you finally disable the account linkage (another dark pattern hiding that option), the main window is still 25% (+) ads.