I don't really have a problem with our kids having some screen time (without commercials, because it's so easy now), but we had to drop Youtube Kids because of this very reason as well.
Amazing that Google thinks that unboxing videos of products paid by the companies to the "entertainers" is good content for developing minds. I was under the assumption that app was curated, but it must not be.
Amazon's Freetime Unlimited with a Kindle and a soft case has been the best setup so far. Lots of educational stuff from PBS, but they can also mix in the Pokemon or super hero cartoons.
Surprisingly (or not), the kids sort of gravitate towards the more educational PBS shows.