Random ruleset is indeed garbage. If you had 30+ cards and Random always gave you 4 2 stars and a 3-5 star, and 60+ cards gave you 4 3 stars and a 4-5 star, then that would be ok. Then at least there might be some hope, and you'd have to adapt, but uh. You're not winning much of anything with 4 1 stars against a deck that has multiple 4-5 stars. It's ok for Random to be completely random when playing another player, but against an NPC it's just... stupid.