I suppose Happy End is a matter of definition. Sometimes snatching a pack of chips while getting carried out of the exclusive bar by the bouncer can be a victory. I play both Team Evil and Team Good, so for every victory of one side, the other has very little to celebrate.
This was the End of Round 5 screenshot in my active save:
https://64.media.tumblr.com/904f98ff68f4f4ba6db23a7c3e462003/40078f84024acae9-6e/s2048x3072/650e4a1ad5f5066f967477a79154516762ce6f2a.pnj
Two sims kissing, one sim lying on the ground (electroshocked and about to get jailed), one walking away (secretly has feelings for the sim she had to arrest) and one staring into space (sad at the team breaking up). And a droid, because everything is better with droids.