AI players pick their own cards, and manipulate your deck so that your good cards either start out on the bottom ,or seem to never show up. As for people whining about ADs to get cards... Unless you're dropping a dollar to pay the developers for making a game you want to like, Get used to the ADs; That's what's paying them. Game Development is a job. They're not obligated to stay up all night,stressing out, making complicated games for free.