I’ll start:
Capri
insta - blue sea, beautiful location, chic, amazing food etc etc
reality - severely overcrowded, huge queues for everything, extremely overpriced, beaches tiny and so full, struggling to cope with the number of tourists, crazy busy, chairlift was fun, blue grotto website said it was closed but other tourists told us it wasn’t, however there was a 2 hour queue for it. Sea was very blue and clear, that was a positive. Really grateful we were only on a day trip as not impressed and would not go back. This was in May so god knows what July, August would be like!