I disagree. I’m currently working in agile and it’s the best team I’ve worked in/with. It can easily go wrong, but it can also work really effectively. Implementing agile in an “ok” way, is still better than waterfall in most instances. Of course it depends on the business context.
Take all of OPs complaints for example. Sure, they can be an issue if agile is implemented poorly (or not at all in OPs case), but all of them are inherent issues with waterfall. Developing something only to find out days before launch the business has something else in mind. There would be much less chance of that happening in an agile environment over something like waterfall.
There’s a big problem with people saying they work in agile, when they’re really not. Like in OPs instance. And that leads to the negative sentiment about agile never working. I get it, I’ve been there and had to work in agile teams that weren’t really agile. That doesn’t mean it can never work.