it's life.
Try doing what I have been doing for years. Lie about my name, my age, my gender - imagine the confusion with a name like mine. But then I don't always use the obvious handle. It means I usually get ads for things that younger people are interested in, easier to ignore.
The only websites that know my real data are those I absolutely have to give valid data for like banks &/or people I might phone up and sort the account out for. Utilities certainly don't need to know my age.

I never use Google, but Gooooogle tries its hardest to sell me pension annuities. Never looked at those things. But then I am piggy-backing on the Girlfriends account via a remote hot-spot. BT use Google so whatever I surf for Google get the data. It has been the case even when I used the loval library to surf, there all data is wiped so the ads relate to everyone who used that service.