Magic: The Gathering Arena

MTG itself is fun, lots of creativity that's possible in the game design. The Arena software is pretty good. But it's very hostile in design: opponent can quit the game without conceding, forcing you to wait 5 minutes for them before you get the win. There is no penalty for doing this to people, no penalty for slow play either. It's also very stingy, you don't get many packs or wild cards (which are used to craft decks), even if you spend a lot of money you'll only be able to make one deck.

Really fun game; I especially like how different the decks feel to play.

I love MtG in general and interface is also great here, but the whole game and card collecting system is designed solely around maximizing income from microtransactions. And it makes game balance simply unplayable - you either fill daily tasks every single day till eternity to always keep up so it feels like a second job or you need to pay shitload of money.