I had a similar problem after upgrading to a faster broadband connection. Seemed to me that the extra speed just brought more adverts.
I solved most of the problem by using DuckDuckGo, a VPN and turning ALL cookies off. There are a few sites that wouldn't let me in unless I accepted cookies, their loss. The main sites that seem to need cookies are sites such as banks.
Anyway after doing the above adverts dropped substantially.
Give it a try, and I would love to know how cookies actually help me.