BrokenItemsCleaner will get rid of the entities but it will not get rid of what is creating loads of entities. So you would have to run it daily which isn't ideal as it's getting rid of the consequence and not getting rid of the cause.
After seeing your plugin list which isnt in alphabetical order i'm not really sure. You do have alot of plugins that should get rid of entities but you also use no decay. All entities plugins are
- EntityCleanup
- HeldEntityFix
- AutoPurge
- EntityReducer
- Object Reomover
- DespawnConfig (what did you change in the config?)
- AntiItems (creates lots of components for people to have (i think 1000 of every component for every player)
- BodiesToBags maybe not sure what this does
My best guess is maybe wrong config for AntiItems (very high values) along with the DespawnConfig maybe.
Maybe if you don't want to delete them reset all their configs by default and see if it does help some