I think adding some daily rewards would soften the blow for losses. I made a post suggesting changes with some of these factors in mind. Overall, having a daily reward for antagonists to gain 2 stigmas once a day regardless of a win or loss would really temper the situation. Some character balancing is required across the board though, Lycus and Harec need a large buff, and Ginebra needs a flat nerf. I would also say that Konstantin and Kuzmann are straddling the line with their toolkits, making them a must-pick in some situations.
As far as raider rewards go, it makes sense to offer lower rewards for a loss, but I think the scale of rewards are a bit too drastic. If you can earn anywhere from 500 to 5 000 of a currency, it's a little bit too extreme. The rewards need to be averaged out a little more.
Right now, for max rewards you need to:
-Have an antagonist join your game (completely randomised)
-Win the game with a high score
-Hope for a Blueprint to drop, doubling your rewards (again, completely random)
And to make this randomness even worse, if you don't get an antagonist in your game, not only are you getting lower rewards right off the bat, but if you have high MMR, the game is infinitely harder. Most random players I play with, upon realising there's no antag, and seeing the difficulty, will either immediately call for a surrender on maps 2-4 of Alien Myths, or they just disconnect eventually.