The only difference between the Krenim and the TIC is the Krenim's default solution is to destroy civilizations and with the TIC, that's only the implicit result of their actions. Is one better than the other? Probably not.
I suppose you could argue that the temporal prime directive essentially says "Whatever events led up to the timeline as it exists at this moment, we're sticking with them." Which would explain why they might intervene in Future's End and Relativity and not in Timeless or Endgame. Which is really just as convenient as the original prime directive, as it says we can ignore the children who were never born because Admiral Janeway changed history but are allowed to preserve our own children.