D&D had a massive player revolt a while back in response to WOTC (at the requirement of Hasbro) trying to take ownership over everything players create in the D&D universe, breaking their long-standing promise to all of those creators and players.

Several of the top D&D people who were advocating for players resigned around this time.

WOTC/Hasbro since relented under this pressure, but the bridge was already burned. My group hasn't played a D&D campaign since. We switched to Pathfinder 2e and found that it was a better system altogether.