S&S

So, I'm listening to the Sapphire & Steel audios again and I just had a thought that's really bothering me. Obviously I'm not the first person to wonder this, but I kind of want someone to help me think it through.

Why are we so sure the Elements are doing the right thing? Why are we so sure that Time really is evil? Is it just because we're seeing these stories from the Elements POV? Because S&S tell us Time is evil? Because honestly, S&S always seem to end up fucking over everyone they get involved with and sacrificing a lot of innocent people.

So, what am I missing? What evidence did we get that Time is evil? Help!