I think Adele has always seemed like an OK sort, very down to earth and affable - but I do wonder (as a pp said) if she s believing her own hype now. She is coming across as a massive drama queen now, and although she is talented and quite good, she is overrated. That luvvie ITV 'Audience with Adele' show was pretty nauseating.
When she made her comeback last year with her album '30' she was treated like a God. She is decent and her songs are OK, (although they're quite dreary and samey, and very few are upbeat and actually very good.) But she is not even in the top 10 best female singers of all time IMO. And she is also not very professional...
I also wonder if there's more to it. Someone mentioned poor Vegas ticket sales (on twitter) and I wonder if the Tottenham lass has bit off more than she can chew and tried to rise too far above her station.
As I said earlier though, I can't get angry or upset for the 'poor people' who have lost money. Obviously got more money than sense to spend two to three thousand pounds on a naffing concert ticket. I mean WTAF are they charging THAT much for? Just because it's coming from America's version of Blackpool? 
Fuck that! i would not have gone to see her in BlackVegasPool, if the tickets were a fiver!
As also, as I said earlier, anyone who can afford three grand for a concert ticket can afford to lose five to seven hundred pounds for the flight and hotel. That's the risk you take with concerts, they can be cancelled, especially with covid about STILL.
That's why I don't feel sorry for people who booked holidays and they got cancelled and they lost 1 or 2 thousand pounds or so. We are STILL in the biggest pandemic in anyone's living memory, and people are acting like covid never happened. Fine, go ahead, but don't cry off when things go tits up like this, and you lose money. That's the risk you take.