Until producer Fred Freiberger from ST Season 3 came to Space:1999 Season 2 and tried to turn Koenig into Kirk.
Game over.
Season 1 was good, but Season 2 was too soft and attempted to be character-oriented. I don’t see the Freiberger-Koenig as being anything like Kirk, though, nor was there an attempt. Koenig was devoted to one girlfriend in the series, bed-hopping, didn’t engage in the weekly histriionics, and just seemed more adult. The US funders of the show wanted him, and he ruined the show. I have no idea how Fred “Show-Killer” Freiberger had a career in a genre he had no feeling for.