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 16+ year old Reddit account, but was shocked when the whole 3rd party app situation was going down to learn that patently Reddit had ads. Between pihole and browser ad blockers even when I used the web version I never saw them. Don’t think I was missing anything.