JdeBPChallengers (2024) is no Jules et Jim.
None of the characters is likeable; the ending is not any sort of resolution of a plot element; even I can tell that the tennis play is unrealistic; and the changes of timeline to the flashbacks are sometimes confusing.
If you are looking for the billed romance, there is not any; there's instead a lot of the principal characters being nude or almost-nude.
Some really good cinema has come from stories about failed and dysfunctional relationships. This is not one of those cases.