I don’t see why Scientology is significantly worse than any other religion.
Yeah, it takes your money, but you’re also expected to support your church/synagogue.
Yeah, it brainwashes you, but so does every parent who brings their kid to a sermon about heaven and hell.
Yeah, they go after apostates and critics—so do Christians, Jews, and Muslims (especially Muslims!)
Yeah, it’s based on science-fiction BS, but I actually find the idea of galactic emperors and souls trapped in volcanoes a lot more believable than, for example, a Jewish zombie magician who is his own father dying as a sacrifice to himself to change the laws he says he hasn’t come to change because he wants to make it easier for us to avoid punishment from himself for the evil force imputed onto us by our clay-man ancestor, who ate a magic apple at the behest of a talking snake.
The only real difference is that Christianity has had 20 centuries to settle in and seem normal when it’s actually just as insane as the crap in Scientology.