What lore do you ignore?

[Iscah]

Things are happening again and again because we're in a loop. We go to the past which prompts Venat to sunder the world and set up the Ascians to do the rejoinings, which leads to our creation, so we go back in time and tell her all this which prompts Venat to sunder the world.

The only people with enough knowledge of what's going on to break the loop are Venat and the WoL and while the WoL has chosen inaction, Venat has chosen to do everything in her power to maintain the loop.

The term "time loop" is a simplification. It's more like a series of interlocking time-travel-related events that make some people's path from "past" to "future" rather more squiggly than it is under normal circumstances, but that doesn't mean that the people are stuck in a loop or living through the same events multiple times.

Venat is not seeking to maintain some trapping loop indefinitely, but to ensure that in this one sequence of events, things play out as you told her they would and will lead back to your existence and your seeking her help in Elpis. Once the world has reached that point, the history she knows is over and everything else is up to you.

What are you thinking a time loop would even look like? Do you think Venat is somehow stopping time from progressing beyond the point where we travel back to Elpis? Why would she do that? Her end goal is saving all of humanity (which, whether we agree or not, she sees as continuous with her own ancient race), and the route to do so is equipping you with the knowledge that you need and then trusting in you to defeat Meteion.

Additionally, the WoL does not "choose inaction" in Elpis but has no choice but inaction. This is a vision of the past and they need to learn what happens in this timeline's past. There is nothing to be prevented, because it already happened, and even Elidibus warns you of this before you enter the portal - that you cannot change the tragic outcome, only observe it. Our time to act is in the present, not the past.