The OP is lacking a basic understanding of game mechanics. Once you take out the helm, or lure the pilot out, the evave chance drops drastically. When the 'missile them in the shields, then finish them off with lasers' strategy stops working perfectly after a few sectors, you are supposed to adapt accordingly, not get frustrated by trying to force it to succeed. With things the way they are, it is no wonder that 'more than 90% of your runs just scream 'FAILURE' in your face'.3) Having a miss chance of around (Or even upwards of) 50% is a gruesomely frustrating game element that takes away from the fun. RNG is a horrible element in any game.
As for the unlocks, I tried this challenge once. Got murdered on my 4th run, but I've unlocked 5 ships over the course of 4 runs. Homeworlds aren't at all rare to find. Of course, unlocking the ship after you find a related quest depends on both your skill and how well do you know the requirements for completing the quest.
Bottom line is, if you blame the game for your failures, you are not going to get better at it anytime soon.