The 9-2 Los Angeles Rams have crossed the threshold to a successful season. Even if the team loses its final six games (that won't happen), the team will end the season with a record of 9-8. Of course, at 9-8, success is relative. The team will not win the top seed in the NFL playoffs, will not win the NFC West Division, and, based on the records of other NFC teams, will not even make the playoffs.
So yeah, a successful record truly depends on the reader's definition of success. But there are many players who, even if they do not earn the recognition of NFL sports writers, analysts, and insiders, have played incredibly well this season.