Perhaps my lack of familiarity with how other games have implemented weapon durability and repair functions/mechanics is keeping me from being able to fully understand either how bad it is in this game, how good it is in other games, and how it could be for this game if it were implemented in a more proper fashion.
That said, and to repeat something I've mentioned before ... I don't mind having weapon durability in this game. I do, however feel that weapons break too easily and too quickly. If they lasted about 1.5x or 2x longer, that feels like (on paper) that it would be a game changer - literally.
On a similar note, playing off a comment you made (about so many items in this game having no real use) ... I agree. This game is FULL of items ... TONS of them ... some that are functionally so similar there's no need for the extreme amount and variation. I have a post in another thread listing out all the one-handed weapons ... there are over 30 of them. That's so unnecessary, even though I understand the logic. The devs went to great length to give each race, culture, situation, etc. their own weapons, which would be much like real life. However, it's just overkill in the game, and lends itself to confusion and too much decision making. It should be much simpler. Same with a lot of the foods and monster parts. All the different meats, fruits, herbs, veggies, etc. I get it, I do ... same logic as the weapons, re: realism to a degree. But man, having 7 pages of "materials" to scroll through when all you really need are a few. It just makes it that much more cumbersome to work though the game. You end up spending so much time changing clothing, selecting a new weapon, sorting through foods, monster parts, ores... so on and so forth.
I still give the devs a pass here though, as they really broke convention for Zelda here, and did work very hard to create something special. I think we all have to realize that a first pass at something like this would not be perfect. I just hope they hear the feedback, compliments, complaints, suggestions, etc. from their audience and take them to heart when developing the next version of this game. There is a ton of potential here for the next iteration to be a vast improvement, and something truly amazing.