I get so many repeats in stuff I'm not interested in at all, and completely unrelated to what I watch.
I don't know if it's a matter of those ads bidding the highest or what. But YouTube's ability to show something I'm interested in is worse than even what the daytime TV ads were back in the day.
Twitter (when I downloaded my info, they were still called that) classified me as speaking three languages I know zero words of, and as having interests in several sports (I care for none); my YouTube ad experience is like yours; my Facebook experience today was about renouncing my US citizenship (I'm a British national); the Instagram ads are only marginally less bad — I do find myself liking them, but I have no idea what they're selling because what I get shown are all uplifting landscapes or cute animals with no sales pitch.
Edit: also, a friend of mine was just playing a game, advert popped up in a language neither of us could read. I had to open Google Translate just to find out it was Romanian and which button was "close" (and also to discover that it was an ad for "easy and fast international payments"?)
YouTube's audience size and advertising metrics have long since gone through the point where individual creators or groups of them matter little. If a creator walks off the platform there are more who will fill the place, in search of potential monetisation, so youtube will still have somewhere to hang adverts off. An advertiser leaving is harder to replace than a content provider.
eBay has a similar flip some years ago: they realised that there was more value caring for buyers needs than sellers: sellers swarm in attracted by the number of buyers and are difficult to put off for long as there are often few other options, buyers need to feel safe to hand around.