actually, in o5e, according to
crawford himself, your passive perception IS the floor for your perception (22:20 for the start of passive perception, 23:20 for when he starts explaining it's the floor) - the reasoning seems to be the act of perceiving is something you're always doing, and so it doesn't matter if you roll low, since you're always perceiving, which would also mark it as an exception to most other skills meaning it only sort of steps on the toes of other features. so if a5e is the same in this respect (which...i have no idea if it is), then...yeah that ranger/fighter is seeing into the dreaming lmao
...i'm starting to see why pathfinder 2e separated perception from the rest of the skills. also, good lord, 30 passive perception at level 5? how did he manage that?