I think this game has some crucial issues, but the OP probably didn't play the game long enough to run into them.
Those complaints are legitimate design choices, which though they are questionable, are still for the most part fine choices.
Weapons break, but weapons are everywhere. Personally, I think that's arbitrary enough to the point where it brings very little positive to the game, and would have been better off removed. Still, I think it's fine, and definitely balanced out by the abundance of weapons. You also don't have to fight in most parts of the game, and it's a great way to encourage you to not be overly aggressive.
The developer should be allowed to curb behavior with limitations. That's just design.
The weather conditions are hazards. Though there's a nearly immediate shift between surviving and freezing to death, there's also a nearly immediate shift in Link's body heat when he switches from a t-shirt to a warm sweater.
So they balanced it, for the purpose of keeping you mindful of the way the temperature system affects other parts of the game.
The story is definitely weak. However, having the weakest story in the Zelda series isn't saying much, since they all have pretty shallow stories to begin with. Which makes sense. Miyamoto really doesn't believe games need story. The plot that enfolds through your agency in the world should be the story, in his view, which makes sense.
If you were every trying to play one of these games for story, you've been setting yourself up for failure.
As far as upgrades, once you leave the tutorial area, there really are no substantial ones. If the game was 20 hours long, that might be feasible, but I actually think this is a design flaw, as the game can last you mote than 70 hours even if you aren't trying to do most of the sidequest and shrines. Playing for that long without any added depth or learning of the game's mechanics will get boring for many. It's why normal Zelda games keep giving you cool stuff up until the very end.
Learning curves can be fun. Sadly, this game's depth will end somewhere between you finish the tutorial area, and understanding the complex interactions between the systems that run the "physics and chemistry" of the world. That's cool, but 70 hours in, you kinda wish you'd see something new. Hell, 20 hours in I was already feeling that way.
So I'll agree with you on that last part. And the story being weak too(, though my low expectations based on the previous games made me not care so much).
But you're entitled to not like the game. It's your time. Don't waste it trying to like something that's not clicking with you. Fans be damned.