Drowned target axolotl with high priority, breaking any drowned farms that rely on them targeting something to path to. Now they just swim around aimlessly after some aquarium fish instead of going after villagers or trying to trample eggs. Drowned should target eggs and villagers over ambient fish.
Axolotls only spawn up to five blocks above an overworld stone (deepslate, stone, tuff, etc.). Replace the floor of the farm with something axolotls don't spawn in.