People who have started the gym and then stopped, what usually caused it?

I’ve been thinking about this lately because I've seen so many friends (and myself in the past) hit a wall after a month or two.

Was it motivation, time, not knowing what to do, feeling awkward, not seeing results, or just missing a few days and never getting back into it?

I’m not asking for tips or workout routines. I’m just curious about the real reason people fall off, because I feel like the standard fitness bro advice of “just be disciplined” is not the full answer. What was the actual breaking point for you?