Actually unremovable, i.e. unrootable and with a locked bootloader? That's pretty bad. On the other hand, when I looked into the Android community a few years ago, it was almost "common knowledge" that a lot of the cheap and unbranded ones come with preinstalled crap, but they're unlocked by default and easily rootable so you can remove it, and there's various guides on how to do that and make a custom ROM.