>>108217933While I not defending the scheduling foatmat of Amphibia, it has a history that long predates Netflix (even if the focus is just on animated shows).
In the 80s and 90s, back when many of the most popular toons were syndicated, shows would often blow off most, if not their entire 65 episode runs by premiering episodes Monday-Friday for weeks striaght. The Disney Afternoon lineup was one such offender of this scheduling habit.
Later, in the late 00s and early 00s, Nick gained a fetish for premiering episodes for its most popular animated shows in this bomb format.