I don't expect to get everything for free, and I'm not ungrateful.
This is one of the best games I've played, and I'm constantly blown away by the new content and features the developers create. I'd happily pay more money for the game to support the devs if they needed it. It's much better than most games.
That being said, I don't think it's "ungrateful" to tell the devs how they can improve when they release something that primarily favors older, richer players who've been playing for a long time. The least they could do was be more honest about how the claw machine works.
But you're right, I haven't played any Chinese games, so maybe I am expecting a bit too much.
Igor