How can I fix raycasts that are ignoring most objects that are not directly in workspace?

I want to raycast in the direction of a player's mouse, however, the raycast does not go in the direction of the player's mouse and redirects itself to the nearest object (any object that it deems fit) in workspace. Also, the raycasts sometimes just don't hit anything at all seemingly at random.

local lt = require(script.Parent.GameFunctions)

function shot(plr,pos,team)
	local beam = script.Parent.otherstuff.effects.Beam:Clone()
	local particle = script.Parent.otherstuff.effects.ParticleEmitter:Clone()
	local barrel = game.Workspace:FindFirstChild(plr.Name)["Laser Gun"].Handle.Part
	local dir =  pos - barrel.Position 
	local rayParam = RaycastParams.new()
	local hb = script.Parent.otherstuff.hitboxes.networkcomp:Clone()
	hb.creator.Value = plr
	hb.active.Value = true
	hb.Parent = game.Workspace
	rayParam.FilterDescendantsInstances = {workspace.LazerTagAssets, barrel.Parent.Parent, plr.Character}
	rayParam.FilterType = Enum.RaycastFilterType.Blacklist
	rayParam.CollisionGroup = "Default"
	rayParam.IgnoreWater = false
	local ray = workspace:Raycast(barrel.Position, dir.Unit*1000, rayParam)
	
	print("remote")
	if ray then
		print("loltest")
		local hitins = ray.Instance
		local hitpos = ray.Position
		hb.Position = hitpos
		beam.Parent = barrel
		local hitatt = Instance.new("Attachment")
		hitatt.Parent = hitins
		hitatt.WorldPosition = hitpos
		beam.Attachment0 = barrel.Attachment
		beam.Attachment1 = hitatt
		particle.Parent = hitatt
		if team == "o" then
			beam.Color = ColorSequence.new(Color3.new(1, 0.545098, 0.145098))
			particle.Color = ColorSequence.new(Color3.new(1, 0.545098, 0.145098))
			hb.Color = Color3.new(1, 0.545098, 0.145098)
		elseif team == "g" then
			beam.Color = ColorSequence.new(Color3.new(0, 1, 0))
			particle.Color = ColorSequence.new(Color3.new(0, 1, 0))
			hb.Color = Color3.new(0, 1, 0)
		end
		beam.Enabled = true
		particle.Enabled = true
		print("shot : " .. hitins.Name)
		if hitins.Parent:FindFirstChild("Humanoid") then
			local hitplr = game.Players:FindFirstChild(hitins.Parent.Name)
			lt.respawn(hitplr)
			lt.addpoints(game.Workspace.LazerTagAssets.values.scores:FindFirstChild(plr.Name), 1)
		end
		wait(0.1)	
		hitatt:Destroy()
		particle:Destroy()
		beam:Destroy()
		hb:Destroy()
	else
		hb:Destroy()
	end
end

game.ReplicatedStorage.FireLaser.OnServerEvent:Connect(shot)

Client

local tool = script.Parent
local Players = game:GetService("Players")
local player = Players.LocalPlayer
local mouse = player:GetMouse()
local RESET_SECONDS = 1
local isTouched = false
local t = "o"
function fire()
	if not isTouched and tool.Enabled == true then
		isTouched = true 
		script.Fire:Play()
		local cf3d = mouse.Hit
		game.ReplicatedStorage.FireLaser:FireServer(cf3d.Position, t)
		script.Reload:Play()
		wait(RESET_SECONDS) 
		isTouched = false 
	end
end

tool.Activated:Connect(fire)