In 2.3.1 I never had any issues with keeping the nations happy, however now I have 3 bases, one in north america, one in russia, and one in Australia, north america and Australia are strictly mission bases I have 16 soldiers between them and Russia is right next to my ufo yard for production, currently Im unable to un-assemble any ufos since their needed to keep my nations from giving up, I have 6 sam sites strategically placed wherever my stilettos cannot reach.
I am currently taking every mission possible and as far have not missed any of the terror missions that pop up from time to time and shooting down every ufo and selling them to the worst off nation.
It is rare that I lose any civilians in terror missions, most of my units are currently amazing shots especially with reaction shots, Ive been trying to retry ever mission where I lose a civilian however I didn't think that losing 1 would be taken so harshly.
Most of the nations are tolerant some are mad, and 1 or 2 become angry. Im desperately trying to acquire enough money to create a 4th base, perhaps I need to drop back a few saves and convert my 3rd base into another mission base instead of having it be full of workshops...
Im not sure if this is a glitch.. or perhaps just a new addition to the 2.4 version to add more of a challenge to the game, however in 2.3.1 I could easily miss a few missions with out losing an Exuberant nation.