Would it make the internet better? Probably.
Would YouTube get shittier if Google was broken up? I was under the understanding that YouTube is a loss leader service for Google, but I still think its one of the best social media sites on the web. Even when you consider the number of ads (that doesn’t affect a revanced user).
Not neccessarily. A spun off YouTube would still have YouTube premium and ad revenue. They could also sell user data to 3rd parties (I doubt Google currently does it on a large since it’s in their interest to have a better ad network than its competitiors). A move similar to Reddit’s with their API and exclusive search agreement or agreements to feed certain videos to AI would both fetch a higher price and upset the quality less since the vast majorty of videos watched are found through YouTube itself.
The idea behind breaking up a monopoly is to allow competition. So if a competitor to YouTube arises, then both companies will have to offer better service to entice more users.