Ads are the way the internet can be funded. For most free sites, they need to either be subsidized by another income (see say a personal website that you host yourself - you pay for the domain and hosting if it's not local). Or by either selling a product (see many software companies), or lastly by using ads (see YouTube, Vimeo, and numerous other video sharing sites)

I understand targeted ads being a nuisance and vehemently despise the datamining that supports said systems. But ads in general aren't an evil until they obfuscate the core material of a site. When you block ads, especially on YouTube for creators who use the platform to attract ads and sell their content then you prevent people who've worked to supply their income. If your issue is the ethics that are at odds with Alphabet and the privacy concerns, your fight is with your government to restrict them, Alphabet's own trackers (which you can work towards disabling).