Agile is just a way to apply a) constant pressure, b) not plan too much, and c) explode your T&M.

It's really good for a consultancy to churn through developers whilst billing hourly / daily, but less so if you want to build a product, or actual productivity.

That's not to say there's nothing good about agile, but when your average team consists of a Delivery Manager constantly applying pressure and Product Manager with no tech skills deciding what gets worked on, it's immediately obvious nothing actually changed.