This is Ensign Harry Kim of the USS Voyager. And he is the most useless character of all time.
Kim has basically no memorable personality traits to him what so ever and most of his notable story moments revolve around him failing in some capacity, whether it's having the worst luck in the galaxy with women...
...Or causing the destruction of Voyager itself...
He can't even properly fix his own mistake without needing someone else to suggest the actual idea that saves lives.
Harry Kim is so pathetically worthless that he straight up dies at one point, gets replaced with a duplicate of himself, and nobody cares enough to ever mention it again.
This dude is on the show from episode 1 until the very end of the series and never gets promoted. Tom Paris, his best friend over the course of the series, starts off in fucking Starfleet Jail, gets reinstated, gets demoted, and then gets promoted above Kim's rank all over the same period of time while Kim does jack squat. B'Elanna Torres starts off the show as an enemy of Starfleet and instantly outranks Kim by the time she puts on a proper Starfleet uniform. By the time Voyager ultimately returns to the Alpha Quadrant, Kim technically needs to address the bus boy from Quark's Bar as "sir".
Kim is the most worthless character I've ever seen in a TV show. I welcome you to talk about anyone else you think is this level of useless to their show.