>no routing
>simplistic vehicle types
>can only use industry you yourself build
>water is pumped from source then delivered by truck 20 metres to the treatment facility instead of being piped right in which would be shorter and more efficient since there exists only one entry way
>no terrain landscaping
>have to unlock more facilities to arbitralrily extend playtime
>limited map size
>no outlet for raw resources
>simple finance statement only reveals current and past months earnings/losses
>no bank loans
>your business can only run at a loss early on due to arbitrary gating
>advancement in areas you didn't specialize in is extremely slow
>upgrades with no logic to how they work
The game has severe problems, if OpenTTD allowed you to rotate the map, came with more detailed industries and longer industry trees by default and had a better default graphics pack it would do everything that this game does but better.