What is your alternate proposal? Other services don't deliver as high a quality, and not all content on youtube is available elsewhere, in my experience.
1. Ads are great because they allow anyone to watch videos around the world. Video delivery at this scale obviously can't be wholly free, and if you charge for it then you are pricing out low income people all over the world. Speaking of charging for it...
2. You can pay for YouTube Premium if you dislike ads this much. If you pay for Premium, they don't show you ads.
3. Do you have an alternative platform in mind that has an equivalent experience to YouTube, but without ads and is free?
4. I don't actually see any ads on YouTube because I use Brave.
