The mount and crusader systems are almost entirely broken and embarrassing to release in that state, yeah. But it's not even just bugs, a lot of stuff just isn't implemented. Tons of subclasses features are not actually in the game even though it shows you getting them on level up. It's dishonest to release a game like that and not put up disclaimers about what isn't implemented
That's the gist of what's bothering me. It isn't really about bugs. But to be fair, there are so many options you can find something that works.
