If I type in the name of a company so that I can navigate to their website, and I have to scroll past my whole viewport of other companies bidding to be placed above where I'm trying to go, I learn it's faster for me to just type the website address into the bar instead of going via Google.
They designed a UX that made my life easier and caused me to form a habit, and then broke that UX for money causing me to form a new habit.
It's just one example of dozens, but the consequence is that I see 95% fewer Google ads than I used to. My guess I am on the leading edge (along with many others on this forum) of a wave of change of user behavior that spells pessimism for Google search revenue.