I thought they were so boring.

the earth one you have to go down 4 times to kill all the bosses. And it doesmt even matter since they respawn.

the fire one is pissing annoying when you get to the room with the people walking that you have to get past in time.
And I never even beat it cos I killed barbarrica and it took me out

the water one wasnt too bad. But after losing on atomos I gave up.

didnt even bother with the wind one