I use ad blockers and open source privacy focused software whenever I can but occasionally I have to use computers that don't belong to me or an older phone where my usual applications aren't installed and seeing all the advertisements just feels dirty and dystopian.
I think the worst ads are the text to speech ones that say "Download this app today". The unblinking energenic people saying you can make a living at home are probably a close second.
I had a family member visiting that left early because their “games didn’t work right”
(Network blocking)
Sounds like you blocked a different kind of annoyance.
If they left for that reason, they weren’t visiting you, they were visiting your internet connection. :-(