Kagi has good search results and they are presented well. It also has some useful features like forbidding certain sites and prioritizing others. I like that by paying I'm the customer and not the product. And their "small web" initiative is commendable.
That said, I've been a customer for nine months on an annual subscription, and I will not be renewing. The first reason is that I find them just too expensive for what they do. The second is that, even being that expensive, they're not breaking even. That undermines my trust in their future as a search engine and makes me less interested in paying a little extra for a good cause.
"Leads to a bad search experience for users" is Google speak for "they are seeing ads served by other companies than Google"