What surprises me is that this is state of affairs for Google, a company with unlimited budget - to show you ads for things you expressed just a slightest interest in or have already purchased. And it's a state for a loooooong time.

Like - I just purchased some plants from Dibleys, a plant nursery in UK. I've gotten confirmation email to my gmail account. Now I'm served plant ads for that very same company. I'd expect that The Algorithm would be smart to decide "hey, here is a guy that is interested in plants, let's take a look at other people in his age group and occupation, what are they also interested in, and let's serve him ads for that. Or having failed that ads for other plant nurseries in UK". But no! It's astounding, that it's so utterly mindlessly stupid.