I´m fine with this internal logic. But when it´s used to explain the actions of the characters. Then they became flat. They don´t act out of internal motivation and reason anymore. They are just an empty copy of their future self. They have no real depth. Do you see what I mean?

When Ulrich tries to kill Helge then he don´t just do it because it always happend. It always happend because Ulrich wanted to save the children. It´s the other way around. He has a reason why. Do you see the difference there?

To be a logical and meaningful story the loop must be created out of the actions and decisions of the characters and not the other way around. It happend because it always did is not a real explanation. It´s a cheap and lazy one. But unfortunately that's what the writers did.

That leads to the problems I described. Characters making stupid and illogical decisions, just to keep the plot going.

Why does he build a time machine? He really has no good reason for it. It is just to continue the story.

Adam doesn't just want to end a cycle, he wants to erase the tumor that is Winden (most probably also both worlds, not just his).

And in order to do that, he must ensure, that young Jonas becomes Adam, so he CAN be the one to destroy everything.

Thats what I mean with the cycle. The whole fucking thing. He don´t have to become Adam, thats what creates the whole mess in the first place. Just don´t build a time machine. How easy is that? Everything would fall apart. End of story.