Its not impossible. It will require patients and lots of skill. With the attitude displayed above you will not succeed. If you truly want that exotic weapon you can and will finish your bounty. This is not just a bounty for a exotic weapon, but a task to prove your bravery and skill to none other but yourself. That is why the challenge exists. The gun is a aesthetic reward, a great one, but one that will display your vigor and strengths more than great damage numbers. Good luck with your hunts fellow guardian. May the light be with you.