My niece was removed from public school in the fourth grade because her parents found the new math program too confusing for her. My sister-in-law is a science teacher and she used to develop curriculum for her county. She knows a poor curriculum when she sees one.
Anyway, math scores plummeted. Parents who could moved their children to private and parochial schools. I wouldn’t be surprised if the public school is still struggling with that dog of a curriculum they saddled themselves with.
These things are so counter-productive you end up sure that the intent is not to teach math but to make sure nobody knows math.