I switched off most of the stuff I could after GDPR went into force, so at first glance it seemed that I started getting trash.
That was until I saw a banner with a unappealing gray background with a fragment of a poem.
It was an ad. For a poem. This one specifically: https://thelastwhy.ca/poems/2009/7/12/age-of-asininity.html?...
No way in hell I would discover such a thing had my ads been targeted and personalised, since those usually are reactive, so they show e.g. stuff you recently bought(meaning: been searching for recently).