Aside from the fact that switching from 6v6 to 5v5 puts even more pressure on the solo tank, in my experience, the role is simply no longer any fun. It doesn’t matter which tank your team swaps to in order to counter the enemy tank, it’s not good enough for your team. There’s always one or two teammates bemoaning “Tank diff”. Not once do those teammates consider that perhaps the issue is your team’s DPS are playing Hanzo and Ashe against the enemy team’s Sombra and Sojourn. All the while your team’s Moira is off trying to flank the enemy team instead of helping keep your team healed, resulting in your tank constantly dying. What’s even worse is when instead of trickling out from spawn, your tank waits in spawn so your team can group up and attack together. Only for one of your teammates to tell everyone in the match to report your tank. And you wonder why no one wants to play tank.
Honestly as a tank player (usually sigma or doom) I don’t find the role that bad.
Most games don’t really dissolve into counter swapping (or at least if they do I like who I swap to anyways) and I usually just ignore other players toxicity (though it’s still a problem)
I get that I might come of as the 10th dentist but I just find it fun trying to create space or shielding allies as a big tank 🤷♂️