Right....so Harry wakes up and finds himself back home.
We find out that instead, his mate what's -his-name took his place on Voyager and Tom became a bum.
I reckon a follow up should have shown that had Harry stayed in the new timeline rather than go all uppity about stitching his mate up and Tom being a bum - which he seemed quite happy about at the time - showing that the dude who took Harry's place on Voyager managed to find a wormhole or something that would have brought Voyager home seconds after Harry decided that he could decide fate and went back, meaning that everyone would hate Harry simply because he's the reason everyone was stuck in the Delta Quadrant for as long as they were when without him they could all be ordering their favourite take-aways in the comfort of their own homes.
Maybe that happened off-camera, and that's why Harry never got promoted.
We find out that instead, his mate what's -his-name took his place on Voyager and Tom became a bum.
I reckon a follow up should have shown that had Harry stayed in the new timeline rather than go all uppity about stitching his mate up and Tom being a bum - which he seemed quite happy about at the time - showing that the dude who took Harry's place on Voyager managed to find a wormhole or something that would have brought Voyager home seconds after Harry decided that he could decide fate and went back, meaning that everyone would hate Harry simply because he's the reason everyone was stuck in the Delta Quadrant for as long as they were when without him they could all be ordering their favourite take-aways in the comfort of their own homes.
Maybe that happened off-camera, and that's why Harry never got promoted.