TBH, this was pretty much inevitable. The rise of streaming services like Amazon Prime, Netflix and Disney+ have basically meant it's time to put Disney Channel out to pasture. On top of that, most of Disney Channel's recent output isn't really top-tier, so basically, the end was pretty much nigh.
You hit the nail on the head @Big TDINDAHOUS Disney Channel has basically fallen out of favor with a lot of people, mainly due to the poor quality of its shows.