[2019] The opposite team has taken the Elder Dragon Buff. Now what?

Hello! I've seen multiple posts complaining about the new Elder Dragon Buff and I've experienced it in game. While it is fun while on the winning team, whenever the enemy team got it, my whole team would just give up the game and try to surrender.

I've always been (or liked to think I am) quite hard to tilt and I always try to have a backup plan or a way to bounce back. But I haven't yet been able to think of a countermeasure to this buff.

So I'm asking you. If you absolutely did not want to lose a game and the enemy got Elder Drake, what would you do?

Please, please, please do not comment "just ff" or "elder drake is so op rito sucks", I'd really love to have a discussion and learn about the game instead of hearing even more whining about the changes.

I would prefer tips that are not specific to any champions, something that I can try in any game, but if there are any champion-specific tricks you really want to share (like Yasuo's windwall block) go on.

Anyways, thanks for reading and for any tips, and I'll see you (at least the EUW peeps) on the Rift!