I've swapped dozens of users from iOS to Android in the last year or so and nobody has had issues. Over the years I've helped hundreds of people migrate. Most everyone really likes the freedom to use different apps or workflows.
The only folks who ever have problems are people who need to be told how to use their devices. Choices confuse them so android is overwhelming, which is understandable. That's where iOS excels. iOS dictates how users can do things, which works for some people but also atrophies people's understanding of technology. People learn to do as they're told, not how to think about what's going on. Apple's walled garden makes people worse at technology.
Also sounds like you bought a garbage bargain android device. Idk how something can barely work as a camera/powerbank unless user error is present.