I’ve lost a lot more games because my team refused to put together any kind of viable comp. I’ve also lost a lot more games for that reason than I will ever win because one of our tanks or healers switched to DPS.
The bottom line is if your DPS (or tanks/healers) aren’t doing their job and the other team’s are then, as a team, you deserve to lose.
‘We could have won if we had 3 DPS’ becomes irrelevant when neither team can have it. It’s on every member of the team to step up and play their chosen role.