I've worked for one of these companies as it rolled out a new app. Surprisingly, it didn't seem malicious. It was just platform/framework churn + "we need to unify all these apps into one common codebase"
It's that they made no effort to bring over profiles and their associated watchlists, "continue watching" is my most used section of all the streaming apps (which they love moving every time I relaunch the app, but that's a different topic) and they didn't even apologize for essentially throwing away years' worth of tracking what the last episode I watched was.