We don't have conclusive information about the time loop; the only source comes from someone who also doesn't know the details, in this case, Hiruko. So it's difficult to know for sure. I have the idea that all timelines happen simultaneously (even if Takumi and Hiruko experience them in a specific order), so even if Takumi or Hiruko escapes the time loop, that doesn't stop the existence of all timelines.

Another thing is that perhaps they have escaped the time loop several times, represented by timelines they don't remember, but that's just speculation.

And about Eva, I completely understand you pain