CDG airport. I hate that place so much.
Heathrow, Schiphol and Frankfurt are all so much easier to navigate.
On a serious note though: I’ve never bern anywhere in Europe that I straight up disliked. Sanremo was probably the «least friendly» with locals all pushing us towards the casino at every oportunity. The city was also surprisingly worn down.
Sanremo is a joke town, the only thing keeping it alive is the yearly Italian music festival (the one that inspired the Eurovision Song Contest). Also, don't go there in February because that's when the festival is taking place.