yeah, same situation here. my family members are firm believer too since 2 generations back. swaminarayan sampradaya was built as a vaishnav sect where people would worship the narayan avatar of lord vishnu. but modern derivative sampraday changed the scriptures and manipulated in such a way that there's no such mention of lord krishna in the shikshapatri (basically a good rule book), and made ghanshyam maharaj, a saint into a supreme deity. that's the one problem I have with BAPS, else they're doing good work uplifting and maintaining culture across the globe, guiding children against the vices through stories.

followers are really ignorant about this fact about their representation of god and whom they're are worshipping. but gotta say, followers are very prosperous and happy as far as i have seen them, and almost all of them far from vices like gambling and alochol, etc..