As per the title. Yes you need to defend yourselves, bit getting caught without your teammates is a bad position and you were unaware at the time.
But other than that, why do you need to become the third and fourth dps, but you can heal yourself too?
Give them all a longer time to charge. It is like every other fight they get to pop an ult while it takes longer for DPS to charge theirs. I know that by default that all supports have a higher ult cost but I suggest making it all higher.
Edit: Except maybe Lucio, lucio’s ult doesn’t charge that fast.
I just want all supports to get nerfed, but not gutted. Except mercy and moira. They should be annihilated. Mercy is too fast, too easy, and rez takes away the thrill of the hunt. Moira has aimbot(dont tell me its something else, i know its something else, but im gonna call it aimbot.), has fade(busted escape), and is ugly as heck.
There are more, mostly revolving around the removal of the support passive, significantly nerfing support survivability and damage, and nerfing support utility across the board. These are just a few of the ones I found with a quick search.