Déboussolé literally means 'disoriented' or 'bewildered', as if one has lost their compass. It's a more evocative word than simply 'confused'.
In the song, the narrator uses it to describe his feeling when the woman he's pursuing takes a long time to respond to his messages. He sings, "Ça m'a un peu déboussolé" (That left me a bit disoriented), highlighting his surprise and frustration at her unexpected lack of immediate interest, which throws him off his game.
"Elle n'a pas mon temps" is Singuila's frustrated take on a woman who keeps stringing him along. The title itself, "she doesn't have my time," is the song's whole argument: he's decided she isn't worth the wait anymore.
He opens by admitting the attraction was real, she looked good, she made her intentions clear, and he fell for it. But the messages he sends go unanswered for days, and when she finally replies it's on her own terms. Verse by verse he lists the ways she plays it cool while he does all the chasing.
The chorus keeps circling back to the same line: she doesn't have his time. It's part accusation, part pep talk, him convincing himself to stop giving her the attention she isn't returning.
By the final verses the tone shifts from hurt to defiance. He's still stung (his ego took a hit) but he'd rather walk away than keep being someone's afterthought.