The "criticism" is mostly from Apple sheep who fall for all the gimmicks that Apple put forward. They are 8 years too late, and all they can do is some animations that a random user clones in a day. It wasn't Samsung that cloned it, it was the users. Of course, Apple users wouldn't get it, because they've never gone outside their walled gardens, and can never do so.
Apple is 8 years late to foldables market. Their only trick is an animation that was re done by a reddit user in 4 hrs? That's it. It took apple 8 years to buy Samsung displays that fold. But it took 4 hrs for a random user to re do apple's "magic"? Lol seems like one is a basic gimmick and the other one is actual hardware innovation.
It took Apple's late entry into the foldable market to get long-time foldable users to think twice about their devices' software. This is one criticism currently being voiced repeatedly in light of various experiments with the iPhone Duo's animations and features. The other is directed at Samsung, which, as a pioneer in the field may have placed too little emphasis on the software aspect of foldables.