lol nice

but some game final bosses are so friggin hard indeed. , sometimes all bosses are too, and you get like instant killed even if you leveled so much that all enemies around are too easy

I like when they add an optional quest to make the final boss 10x harder than normal, though, sometimes it can be challenging when you want some challenge. Star Ocean 2 final boss is an example

I got something similar in ROL1, Illusiat 3, Illusiat 4 and my RPG Maker game Mysterious Cities Of Gold. In ROL1 the boss is still too easy even in hard mode, even if you don't exploit his secret weakness (that makes his ultimate attack a joke), though, when your stats are maxed out. In Illusiat 4 it's reasonably harder, but too short