the problem is not the build quality, it's the lack of people who join. How can you complain to the host that the build is unbalanced/bad for gameplay when there was no previous gameplay to determine that?
Sadly, nobody even tries looking at TDM's not hosted by people with already good reputations, such as Heed and Bushido. Even the ones that manage to get on the forum gallery don't do well ingame.
I've hosted plenty a TDM in my time, and the maximum players I have ever reached was with 16-18 people, with the old build Strategic Riverside TDM. The maximum I have ever reached with recent versions was 6, using Treynold's old Warehouse TDM, or a small river build titled "Search and Destroy"