For me it is when companies/services market themselves as donating to XYZ cause if I buy their product. If they want to donate, they should have already done that with the money they have. Asking me to give them profit so that they can donate is so obviously pretentious.
The thing is, if I want something I’ll go looking for it. At the point where I’m looking for it or something like it, I am happy to consume ads even tangentially related to that thing. If analytics marketing worked this way (showing me relevant ads when I’m shopping for something, even if it’s for something I am not actively looking for), things would be better. But ads have worked their way into the cracks of everything and that’s my problem with them.
I hate Billboards. I don’t like circulars (waste of paper and generally too much trash), I hate junk mail and I think it’s predatory. Popups (singing, flashing, scrolling when I scroll to stay on the page, tiny exit buttons, video, etc) are garbage.