In a distant future where time travel is as common as space travel in Trek's time, I have no issue with it. Especially since Daniels and his fellow agents are fighting an ongoing time war.
The greater crime, I think, is this: the time war is vast and cosmic and on a scale that was beyond comprehension (even the writers'!). So who does the Federation send to handle this? Possibly the blandest, least exciting recurring character in all of Trek.