Did I got that right?
- You do not bookmark this forum
- You open a new privacy tab in your browser
- you type something like "uk doll forum" in the search bar
- A Google search starts and Google asks you for cookie settings
- you click on the Google search result for this forum
If you are doing it that way I see some misunderstandings.
In a privacy tab you are not logged in into your Google account as all cookies are cleared. Google (or any other site) doesn't know if they are allowed to track you or not, so they need to ask. That happens every time because you are deleting the answer to the cookie question when closing the privacy tab.
With not using a bookmark and not typing the direct url of this forum and doing a Google search instead you are telling Google in your privacy tab that you want to visit the UK doll forum. That nullifies the use of a privacy tab.
My advise: Either set a bookmark to this forum or remember the url and type it completely and correct.
uklovedollforums.co.uk In that case you will get to the forum without Google.
By the way, whatever you choose in such a cookie question, at least one cookie is stored on your end. The answer to the question.
An ad-blocker like suggested is always a good idea. I recommend uBlock Origin
Have you ever thought about using a different browser for doll related things? Just to separate from what other can see.