Honestly the scroll system is some of the shittiest upgrade systems I've ever seen. I like that's it's unique and not just spend money that's it op weapon but holy crap do the devs do everything in their power to make this process as rng heavy and miserable as possible for the player. The scroll chances are bad enough but then they gotta have them blow up your gear and on top of that failed attempts still use an upgrade regardless. Then to add insult to injury the devs just nerf things anyway.