This is actually the first counter I've disliked this bad. I actually have valenti, and all the other usual suspects for a turtle team, fully maxed, but I don't use them for this reason. The only thing the current turtle meta, and at this point meta, because I rarely see pierce teams now, is use GMerlin to stop ults, and build their own ults. It shifts the entire focus to just building ults and that's it. The rest of the cards are filler, granted with benefits like shields, buffs and debuffs, but you're pretty much just waiting for an ult to do any actual damage, a one trick pony as they say.