I just learned an important lesson: Never give up
So this game looked doomed from the moment kat got 2 triples. We went through hell the entire laning phase. Then, me being sion, and noticing their miss fortune didnt even scratch me, I said something very witty: "let's not ff, this is fun lol" it was because of my undyingness from their adc that we ended up winning this seemingly hopeless game. Being completely unkillable, I knew I could just keep farming and eventually get so tanky to where not even their super fed kat could kill me. I baited the enemies over and over again by making them think I could be taken down easily by their adc, yi and gangplank together. With my ridiculous amount of cc, I was able to cancel kat's ult over and over again with a point-blank ult. Jax and ezreal carried, but I was the wise one knowing we had a chance.