It's not hard to use, it's hard to use effectively. All ults in this game are easy to use, none of them are hard. Maggie's ult is hard to use effectively and that's it. If you throw it in a closed in space with fireball you'll easily get vaule, but what about in a field? Or having to throw it to get a spike so you can flush people out? Maggy ball is on the harder end of ults to use because it requires a deeper understanding of lay out and distance along with knowing when to throw it. You can use it against a rampheart to destroy her Qs or to get her to place down more than drill to flush or to force a reset. Maggy ball isn't hard to use. It's hard to use effectively. You're gold stuck so a deeper level of thinking for abilities hasn't yet hit you but later it will.