BT/Openreach are you listening?
I can fully vouch for the results of this survey.
Everything I watch is off the internet (iPlayer, YouTube, Amazon Video etc.), all the services I access are through the internet, and I live in an multi-person apartment with different people wanting different things off the internet at the same time. I'm not even a millennial, I'm a normal 40 something with normal modern day internet habits.
However I live out in the sticks in London zone 6 and my average download speed is 4mbps, and my average upload speed is 700kbps. My broadband connection is not fit for purpose and annoys the hell out of me at least once every day.
The fact that my broadband provider is doing nothing about this also annoys the hell out of me. ...and the fact that I'm paying the same amount that the folks in the next street pay for 'super-fast' broadband annoys me even more.
So it is no surprise that those who have good broadband use it frequently, and those that don't are annoyed by it frequently.