Those are her own issues that were not clarified with the guy.  If she's that sensitive don't swipe around on dating apps looking for instant exclusivity while saying you want a fwb or presenting the situation that way.

If you want exclusivity it is a discussion between the 2 people involved, not one pinning for more with the other unaware.  Until this discussion happens ESPECIALLY after 5 DAYS...everything is off the table.  

As much as you want to peg the guy as a scumbag he hasn't done anything misleading at all - if he was knowledgeable of her feelings and acting this way, you would be correct.