Harder than it sounds! So much of what we interact with online winds up with YouTube in the dependency chain. Kids' coursework, how-to videos, etc. I could also just pay the $$/month to "solve" this problem, but I need my petty cash more than Google does. I'm confident the brilliant minds there can figure out how to monetize my visit even without the real-time bidding industrial complex burning my CPU cycles.
Download the content offline, make a playlist. You can also archive the content forever. No distractions, its organized however you want. Yes, it does take some effort but it fixes all the problems
So long as we're pretending to care about the Youtube TOS, offline downloading without premium is against their TOS. And even then you're only permitted to download and view offline through the YouTube phone app.
I appreciate the fact that you brought up the possibility of paying for ad-free content, but frankly I don't buy this. You can either see 100% of the content for free with some mildly annoying ad content mixed in from time to time, or you can pay them a pretty small amount to not see the annoyances.
Google is a for-profit company trying to sell a product that you find valuable. Not everything they do is squeaky-clean, but this offering couldn't be much fairer, really.