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.
Wavebrowser/Onelaunch are fucking CANCER literally everywhere all the time in ads. Tired of google letting them use their ad service, but ya know, gotta get that money anyway how and in every way.