When I began playing DTV like in the second half of 2013, maps were normally very small and had a few entrances - and people still lost a lot of rounds. Some maps were also glitchy shit, so it was allowed to change them by polling in chat and killing Valdemar. Now there are a lot of open maps, and we are not allowed to poll to change them. The most annoying thing on such maps are horse archers who can kite, and other ranged who just surround you and kill Valdemar. Even peasants can do that. Then, it is also very hard to survive those maps on rounds with very good melee bots, like Ninjas, because it is hard to make a shield wall and they just swarm everyone.
The best way to counter infantry and ranged on open area, especially infantry ranged, is cavalry, but it loses it's horses after first waves and becomes useless unless it's also good infantry - which is impossible untill you grind high level like at least 33-35, according to professional cavalrymen.
Then, some maps are very glitchy, and will make you charge the last bot glitched on spawn to kill him, and it is mostly a suicide, because you will die if you do it. So, what are my suggestions:
1) Give DTV normal cavalry, restoring mounted horses' HP after each wave instead of killing them.
2) Give playes ability to poll to change maps in normal way, using poll mechanism.
3) Give close and small maps more open spaces instead of locking them using fences to give cavalry place to work.