It’s mostly just that it doesn’t make any fucking sense, most especially after the beginning of the game. None of the weapons are mostly diverse enough that the frequent changing created by durability encourages you to really play the game any differently, usually you have a stockpile of extra weapons anyways so you don’t really even need to pick up new stuff, and most of the hard enemies drop the weapons that deal higher damage, meaning you’ll want to use the high damage weapons on those enemies, so there’s not much decision-making going on there. After fighting enough hard enemies later in the game, you get enough high damage weapons that it’s not even really worth it to interact with most of the random bokoblin camps. Not that doing so was super interesting to begin with, outside of like the first couple hours of gameplay.

TotK solves some of these problems with the fusion mechanic and having increased enemy variety, but it’s still not great, and most of what it does serves to assuage the shittiness of the system rather than provide a reason for it to exist in the first place.