Granted, Janeway did a lot of good, but like what Guy said, when Captain Janeway decided to become an accomplice to Admiral Janeway's scheme, Captain Janeway should be held accountable. It doesn't matter that the ends seems to be good for now, because we know that the ends DO NOT justify the means.
First of all, how do we know that the ends don't justify the means?
And, not to sound callous, but...why should we care about the other timeline?
It's gone. Or, more likely, it's been branched off into another alternate occurrence(based on the multiple realities theory). That timeline never happened in the main timeline. Who's going to punish her, the Department of Temporal Investigations? If her crime is the ending of the other timeline, then we're starting to get into "prosecuting doctors for performing abortions". How would you punish someone for that?
Just because I don't like the fact that Janeway got promoted doesn't mean I'm denying her legacy/accomplishments.
But you're saying that "it doesn't make sense to you", even though there's been evidence provided as to why it should.
Again, Captain Janeway's accomplishments were tarred by her willingness to go along with what is essentially a time crime. Time Travel is the worse offenses of all because it makes the story moot. If we are to accept time travel to resolve a problem as norm, what's the point of following any story or caring about anybody?
No one is saying that time travel should be used as the norm when resolving a problem (mostly because repeated temporal incursions can make the problem trying to be solved worse.)
At what point are we drawing the line that time travel is bad, too? Should Picard have gone back in time to stop the Borg in
First Contact? Should Kirk have gone back in time to save the whales in
The Voyage Home? Using the logic here, those actions destroyed whole timelines as well, and altered events as well. Are we saying that
all time travel is bad, and everyone who uses it should be punished, regardless of the motives or results?
Captain should be rewarded for her accomplishments, but she should also face the consequence of her great offense. When you put two and two together, Captain Janeway doesn't deserve to be promoted to Admiral. Not unless she did some other incredible feat between the end of VOY and when we saw her as admiral.
I respectfully disagree. Her accomplishments far outweigh "her" time travel offense.