most of all, the ugly avatar.
tbh, the early game where you are notified you are wasting so much by not going into the gluttony mode or not having the right inspirationals to buy the skills i need and this absolute feeling of being punished by playing casually, and the inventory and storage was pita.
basically, the reason i fell in love with haven at first was how i could hoard as many items as i wanted, and so much freedom in what i could do in the early games. the more i played, the more i learned about how effectively i could do things or i came to know how wasteful i was in the beginning, but it hardly made me feel that i was being punished for not knowing enough about the game; i just enjoyed learning new stuff slowly.
what made haven great, imo, was all the simple systems that could go so complicated and gave you a variety of results with all combined. (on the other hand, salem has so many complicated systems that lead you to one simple result. but thats probably just for the early games, and i didnt play far enough to go advanced due to real life issues back then.)