Play a carry support honestly. That's your only other option.
Just had a game of Olaf Top, Lee Sin Jungle, Miss Fortune Mid, and Ezreal ADC. I went Brand support cause we had almost no AP otherwise (Mf and Ezreal have some, but neither were building for it). Multiple times that game I saw our MF trying to take dragon after pinging it 3 times while our Lee Sin is busy taking his blue or trying to kill the enemy support in their jungle.
I had other games as the ADC where my support Janna and top lane Sion are trying to peel the Vi, Leona, and Camille diving me, which only works for so long, meanwhile our Zed dies before the engage or while trying to 1v2 the enemy Lux and Cait who have no one peeling for them. No clue where our jungle Hecarim was during these fights either cause he should've been able to help Zed take out the two carries no problem. And yet we lose cause only the support and top laner are doing their job.
Granted, I would hope in plat people would play better, but still, if your team is consistently playing badly, just bring more damage so that even if you are 4v5 cause someone keeps getting caught, you can still do something. Not saying it's the best or most optimal idea, but sometimes you have to carry, and it's much easier to do that when you can blow up the people who need to be taken out.