Review so far (8/10)

[Silent Shadow]

Very good story and gameplay mechanics. But there are two things I have a hiccup with: the long reload time after one shot and you can't break out of the reload animation. Makes it kinda difficult to fight multiple enemies. And I wish there wasn't breaking mechanic for melee weapons. Would've been a good way to conserve ammunition.

[Kapdap]

The game never directly mentions it, but the ESC button will cancel reload animation.

[Lanzagranadas]

Ammo is very generous though. My first playthrough, on Soldier difficulty, ended up with spare ammo, and I didn't need to use gun powders at all.

There is a melee weapon with infinite durability: the Knife, and it's actually one of the most useful weapons in the game. Despite having the lowest damage, it can still instant kill any non-armored enemy if you hit them before they notice you.

So if you use Knife for stealth kills and stronger melee weapons for direct combat, durability isn't a problem. You also have Repair Kits, basically the "ammo" for melee weapons.

Melee would be OP without the durability handicap. If you want the perfect melee weapon, there's the Brute Club (3 damage + infinite durability) but it's an NG+ exclusive for obvious reasons.