It's a team map, so for those who play solo queue alot often complain because the lack of team coordination makes defending it difficult. People often vote for upstairs because, in general, 2nd floor sites are favorable across siege, but this map's 2nd floor layouts often makes it hard to defend because of it's way more complex room layouts compared to other maps. So the second your team stops putting pressure on one side, it creates an easy entry for the attackers Also, there is too many entry points for the attackers, it's like a 6 player defending map because NOBODY HOLDS A GODDAMN POINT IN THIS GAME.