There are still plenty new children's media options that aren't hot garbage. Bluey, Miraculous Ladybug, and Spidey and his Amazing Friends are 3 of my son's favorites, and all three have story arcs, characters with a bit of depth and moral fiber, and are in active production. There's also all the PBS Kids content that values learning and modeling emotional regulation, hell even Nickelodeon has Blaze and the Monster Machine teaching kids about basic engineering concepts.

YouTube has been poison for children for over a decade, but it's gotten progressively worse. I hesitate to judge others' parenting, but when someone sets their 4 year old in front of an iPad with unrestricted YouTube access, it really lets you know what kind of parent they are