Minecraft dungeons

I want to know why is it that after a certain level you are no longer allowed to pick the enchant that you spend gold to reroll, and why is it not an option to undo the enchant,?? Why would you only be allowed to undo the salvage once? And never again after another action? I think those are my biggest concerns about this game? Like the fact you can’t get any weapons about level 80 but instead have to level the weapons themselves, I don’t understand why retooling an enchant is even an option if I don’t get to choose which enchant it changed?? Lost the best enchant on my weapon and makes me not wanna play because why is the hair trigger for any buttons so sensitive, not for my controller but for the game? And I live all the Minecraft games but this is down right horrendous, makes me wanna quite playing anything Moran and Microsoft any release after because it’s so frustrating!