Honestly speaking, Dubai.
Not because of slavery, poop trucks, questionable government policies, etc.
The real reason to me is that it does not offer anything traditional or historical. Yes it has some five start restaurants. Yes it has some big malls. Yes you can do stuff like desert driving or hot air balloons. These are all stuff that could be done anywhere else for cheaper.
I understand your concern, but assuming someone looks over all of that, there isn’t something genuinely exciting about it.
Not to mention the terrible traffic it is in now due to the Russia- Ukraine war, other unstable countries within the region, the terrible public transport system Dubai has anyway.