I actively/mentally block products I see in ads now. For example, when I use Amazon's terrible search feature, I'll make a mental note of which listings are "sponsored" and make sure NOT to buy them. Ever, if possible.
When I see ads for things on YouTube, I automatically assume it's a scam... Because it almost always is!
The YouTube sponsor situation is actually crazy, I think 100% of them have turned out to be either scams or just very overpriced. Even ones that sounded reasonable, like Ground News, and VPNs.