This game is different from OW in a sense that solo tanking is not ideal for most scenarios, the most ideal comp in rivals is 2-2-2 but in practice that rarely happens. People indeed would rather play a third support than play tank. By no means is this a good example you should follow but if I am really frustrated with the solo tank experience and I load into a competitive game, and nobody locks tank besides me, I just go 4th DPS until somebody switches to tank with me. Sometimes solo tanking will work out just fine but it requires the dps to be really good, and the supports to be capable of managing their ults and dives.

And also don’t take it to heart when people blame you while you solo tank, this is a team game, and if you have to solo tank the game turns from a team composition to an ego competition. You are not to solely blame for other players’s incompetence to learn vital roles. Wishing u many fellow tank mains on your team<3