My idea for the worst designed map is probably Hoodoo. Hoodoo is terribly designed. The blu spawn is terrible and easy for defense to spawn. The map's layout is very confusing at times. And areas to flank the enemy team are very easy to cover. Plus in my mind the map seems too short. Its very easy for new players to get lost and corners. And does not inspire adaption. If i have to say a custom map that sucks. Balloon race takes the non-existent cake. The whole map encourages spawncamping and cheap tricks in order to achieve your goals. Good concept but bad execution.