So instead of being invested in him, you become a mere spectator of what happens to him. But his character here is so underwritten that you never engage with him as a character.
His martial arts are really good, and he has a certain presence about him. Don't get me wrong, I have no doubt this actor is a big star in China. No, I've never heard of him before either. The main character is Chinese actor Xiaoming Huang. He's the boss of a security firm in Atlanta now. Wait, what?! We don't see Stallone until 10 mins into the film. So why is it so bad? - Well, firstly we start the film with characters (and actors) we've never seen before: A team on some kind of rescue mission from terrorists.
Now I was surprised to see Stallone doing back to back sequels in Escape Plan 2 + 3, but if 2 is anything to go by then Stallone has slipped horribly into Straight-to-Video Hell! Which is quite apt as that's what Hades means (it was the Greek name for the underworld). It was fun and although a little silly it was well put together well directed.