On my Android device (made by Google) I could effortlessly add an Exchange (i.e., work) calendar and see my personal and work calendars ON ONE SCREEN, as god intended.
On Google Calendar (also, presumably, made by Google) you can not do this and must jump through all kinds of hoops with syncing apps or publishing Outlook calendars to WebDAV sites (wha?) or something, none of which work!
I call that broken. I want my work calendar on my Google calendar. And it’s 2015, so I should be able to get that.