First of all thanks for feedbacks and playing our game.
Your normal weapons are a little bit underpowered because we want you to use upgrade attachments (with pressing Q), if you attach upgrade part monsters will take 2 hits on the head (or 4 on the body) from pistol to die. Do that and maybe explore optional rooms and your ammo count should be enough.
About pipe (or crowbar if you want to call it that) , as I said in other comment "pipe should be your last resort hence has bad range and damage (and I admit it's hitbox is not very good). Also you can use it to kill monsters if you detach their both arms so that they can't attack you so you can save some ammo". We still can adjust the it's range after making hitbox better though.