I may be missing it, but i would love a config file with the specific ability to disable the dirt that spawns an insane amount of mobs! thats what spawners are for.... I mean i understand an increase in spawn rate but they are spawning every second!

The dirt is a way to get general drops and xp, liquid xp from the cursed earth farm then powers the spawners for spawning specific mobs.

If you want to disable the ability to get the dirt, you can disable the recipes via datapack on your server/modpack.
data/mob_grinding_utils/recipes/recipe_cursed_feed.json < for cursed earth
data/mob_grinding_utils/recipes/recipe_nutritious_feed.json < for delightful dirt