I did it bois. I beat the singleplayer campaign for Monster Hunter Generations. Astalos, Gammoth, and Mizustune were insultingly easy, but Glavenus was a decent challenge.
I've had my moments of not having patience. The rare drops drive me absolutely mad. I loath Rathalos and Brachydios, but the equipment you can make with their parts is so good, and of course both of them have like 4% drops that you need for the equipment.