Least Favourite Civs to Play Against?

What are your least favourite civs to play against and why?

Kamehameha is mine to the point I just disable the DLC. I'm a huge fan of waiting until Astronomy to visit the other continent. Partly because I like the pace it sets for trade and diplomatic relationships. This is also why I never play Continents Plus.

Austria comes as a close second. I typically focus on strong CS relationships and I hate Austria gobbling them up. Venice I care less since I can usually wipe deal with them via war.

Expansionist civs I hate when they're a neighbour. Completely clogs up all the land around my expansions taking away decent tiles. Typically means I'll have to waste time to delete their cities.