At the end of the day, games of Overwatch are won by killing enemies or making them run from death, and if enemies aren’t dying or afraid to die, then your DPS teammates probably need to step it up.
Step up to where? How about a position where they actually have the firing angle to do their job without dying themselves. Who creates these positions? Tanks, at least in theory. Except so many Tank players approach their role like bigger, badder, glorified DPS.
In low elos, everybody’s mechanics suck and you should just have three DPS. In Platinum and beyond, Tanks tend to be the throwers. Players at that level are skilled enough to consistently punish mistakes like overextending, team separation, lack of peel, uncontested high ground, and all other manners of noobishness. Positioning is the common thread of these mistakes, and it is the central skill of Tank play, but Tank players were not punished enough to improve at lower elos - now these are game-losing mistakes, and they still will not learn.
Reinhardt positions in sight of the whole enemy team, gets hit with Shield Bash, dies. He charges in, gets a pin, dies. I don’t care if you pinned somebody, Reinhardt. Trading the main tank is not a trade at all.
Orisa wastes Halt for some trash damage, gets dived, dies. Won’t give ground to enemy brawlers, dies.
D.Va dives a DPS she can’t 1v1, dies. Worse, she barely wins the duel as baby D.Va, and now we’re down a Tank for the next engage. Just die next time.
Zarya goes in with bubble, gets 40 charge. Inexplicably decides that the dead center of a teamfight is the place to wait for her next bubble. Dies.
Winston uses bubble to shield trash damage instead of taking cover, dives without it, dies. Ults when his whole team is dead, feeds 1000 extra health worth of ult charge and dies anyway.
Wrecking Ball just dies, and dies. Have only seen about five of them that I wouldn’t trade for a Winston.
Roadhog is not a Tank, unless you count the way he tanks your ult economy by feeding charge to the enemy DPS so he can charge his own useless ultimate.
Don’t look at the Supports either. My job is not to heal you through these mistakes. Your job is to not make them in the first place so that I am safe and can provide utility beyond just raw sustain. I know you needed healing in the middle of five enemy Heroes. I’m busy trying to peel myself from the sixth one.
Successful Tank play is 20% carrying and 80% not screwing up. Be steady, don’t take risks, give your DPS space to work and don’t waste your Supports’ time with constant sustain. The better positioning you enable for your team, the more likely you’ll win fights without doing a single aggressive thing. Play your own role and let teamwork make the dream work.