I agree with people here who say we need tougher games. I mean, we all agree AOL is BRUTAL, but other than that and the original, Zelda's just not very hard.
Now, BoTW has delivered on the "Challengingness" scale, because it's similar to the original, and many monsters are brutal, but you'll never find a hard boss in that game that's not a mini boss, and the Divine Beasts are way too short to be very difficult (Especially the Goron one) and the Shrine puzzles are fairly simple.