A lot of these places depend on the time you go, the areas you visit and whether you do any research and planning to ensure you visit the parts and do the activities YOU like the most.
All inclusive resorts can’t really be a review of a destination either. Most of the time the review is of the immediate resort unless you do extensive travel around.
I’ve been fortunate to go to a huge chunk of the places on this list. Many that are consistently listed as terrible in this thread I have loved visiting but I always do my research and would never go over peak holiday season unless I could really help it - and if I did, I’d certainly lower my expectations regarding crowds!
Maldives - don't judge the country based on one resort; there are local islands to explore in addition to the tourist ones. I've been twice and had two wonderful yet totally different trips.
Santorini - if you're looking for a beach vacation then don't go, it's beautiful but yes cruise ships do take over here and on Mykonos. Lovely and calm in the evenings though and so photogenic
Vegas - again do your planning, but it's a marmite destination and there are little natural wonders around without travelling so its not for everyone
Bali - don't judge the island if you only saw ubud/kuta/seminyak. If you want the old Bali try Sidemen - it's beautiful and full of rice paddies and not westernised at all
Cornwall - avoid any school holiday seasons and it's beautiful, but total luck of the draw with the weather as always
Delhi - we had low expectations and were pleasantly surprised. There is something for everyone for a brief pit stop there if you do your research. It's not a destination so much as a transit point
Cape Town - drive out and explore the surroundings especially penguin beach! More scenic than Johannesburg and safer too.
I've just been to cinque Terre and while a beautiful place was just too rammed to enjoy in august - wouldn't have been my choice of when to go. But still worth visiting while in Italy.
I could go on.. 😅