That one person who said the FL isn't stupid... lol that's a really funny joke!
Like, seriously??? Stuck on an island, with murderous tribal people, finds a building with signs of human life.
Doesn't consider that just maybe, the murderous tribal people might live in it!?!? Or at least use it regularly?
Also wandering away from and being rude to literally the only helpful being you've met so far?? Like yeah, she's not sure he's trustworthy, but so far he's been nothing but helpful, and the other alternative is being alone in the freaking jungle that has murderers in it!
Like, ignoring the murderers, has she considered how to get back to the boat? How to survive if she can't find it? Water? Food? Shelter?
That rapist dude thought it was deserted, nobody knows shes there, no help is coming. Literally her only way out is that boat, that may have washed out into the sea for all she knows. Or writing help in giant letters using rocks or something on the beach, and hoping someone checks it out, and doesn't get murdered like mr Rapist.