Once they took the first Sentry in under 4 mins the game was over. A hard push on the Sentry by either team in the beginning until mercs arrive, take your team’s mercs and the middle mercs. The game is over. There is nothing that can be done if your team isn’t cooperating or full of underskilled players.
My idea for a map layout:’
Supply Station->Turrets->Sentry->Turrets->Supply Station->Turrets->Sentry->Turrets->No Man’s Land<-Turrets<-Sentry<-Turrets<-Supply Station<-Turrets<-Sentry<-Turrets<-Supply Station
Supply Stations are the main objective, they are shielded and have significant damage reduction, These stations provide score points and when the time is up the team with the most score points wins.