Script to remove health from building not working, no errors, how do I fix???

This is a common mistake that I see in many people's scripts and that is trying to connect events in loops for you the while true do loop doesn't serve a purpose in your script. I also notice that your touch events are based on the building's parts which should be detecting a if a player's baseparts are touching a building parts. The main thing that should be done is separating theses events and functions and not combining them. I can simplify the script to be this:

game.Players.PlayerAdded:Connect(function(player)
    local debris = player:WaitForChild("leaderstats").Debris
    player.CharacterAdded:Connect(function(character)
		for __, Part in pairs(character:GetChildren()) do
			if Part:IsA("BasePart") then
				Part.Touched:Connect(function(hit)
					if hit.Parent.Parent.Name == "Map" then
						hit:FindFirstChild("Health").Value = hit:FindFirstChild("Health").Value - player:FindFirstChild("Morph").Damage.Value
						if hit:FindFirstChild("Health").Value == 0 then
                        	hit:Destroy()
                        	print("Building destroyed.")
                        end
                        player.leaderstats.Debris.Value = player.leaderstats.Debris.Value + 10
					end
				end)
			end
		end
	end)
end)

If the morph is in the character then try this:

game.Players.PlayerAdded:Connect(function(player)
	--[[local LS = Instance.new("Folder")
	LS.Parent = player
	LS.Name = "leaderstats"
	local DB = Instance.new("IntValue")
	DB.Parent = LS
	DB.Name = "Debris"]]
    local debris = player:WaitForChild("leaderstats").Debris
    player.CharacterAdded:Connect(function(character)
		for __, Part in pairs(character:GetChildren()) do
			if Part:IsA("BasePart") then
				Part.Touched:Connect(function(hit)
					if hit.Parent.Parent.Name == "Map" then
						hit.Parent.Health.Value = hit.Parent:FindFirstChild("Health").Value - character:FindFirstChild("Morph").Damage.Value
						if hit.Parent:FindFirstChild("Health").Value == 0 then
                        	hit.Parent:Destroy()
                        	print("Building destroyed.")
                        end
                        player.leaderstats.Debris.Value = player.leaderstats.Debris.Value + 10
					end
				end)
			end
		end
	end)
end)