Make pinnacle bosses don't have respawn attempt

Please make pinnacle bosses don't have respawn attempt??
tbh I don't care if you make it have 2 times or even 10 times the health pool and makes it as hard as possible... but making it have attempt just making real player like me doesn't have enough attempt to learn the boss movement
right now its like wasting resources and times to get the key all by myself and then has a chance to lose and have to search for the key again
I once play game like this and fighting the last uber bosses with my own build and following all the one shot boss mechanic... true that boss is overtuned like hell and I finally beat her in I don't know how many attempt that takes literal 4 days... but it's the best experience to learn the boss mechanic and finally beat the boss without worrying about losing the chance and have to look for another key again