a foolproof way to tell if you are on a horrible battleground team
not damage done
not objective stats
not healing done
not deaths/kills
maybe not even the score
The best way to tell if your team sucks is if everyone on the other team has every single one of their cooldowns ready at all times. If everyone on the other team is always trinketing out of your stuns, using defensive/immunities, movement cooldowns, etc. It means your team is putting so little pressure on the other team that they don't even need to use any of their cooldowns.